diff --git a/README.md b/README.md
index 31f6e382..7ddb11d1 100644
--- a/README.md
+++ b/README.md
@@ -303,6 +303,7 @@ The hooks to access V8 internals—including GC and statistics—are different a
  - <a href="doc/v8_internals.md#api_nan_get_internal_field_pointer"><b><code>Nan::GetInternalFieldPointer()</code></b></a>
  - <a href="doc/v8_internals.md#api_nan_set_internal_field_pointer"><b><code>Nan::SetInternalFieldPointer()</code></b></a>
  - <a href="doc/v8_internals.md#api_nan_adjust_external_memory"><b><code>Nan::AdjustExternalMemory()</code></b></a>
+ - <a href="doc/v8_internals.md#api_nan_get_external_value"><b><code>Nan::GetExternalValue()</code></b></a>
 
 
 ### Miscellaneous V8 Helpers
diff --git a/doc/v8_internals.md b/doc/v8_internals.md
index 2e7c918b..1c36469d 100644
--- a/doc/v8_internals.md
+++ b/doc/v8_internals.md
@@ -17,6 +17,7 @@ The hooks to access V8 internals—including GC and statistics—are different a
  - <a href="#api_nan_get_internal_field_pointer"><b><code>Nan::GetInternalFieldPointer()</code></b></a>
  - <a href="#api_nan_set_internal_field_pointer"><b><code>Nan::SetInternalFieldPointer()</code></b></a>
  - <a href="#api_nan_adjust_external_memory"><b><code>Nan::AdjustExternalMemory()</code></b></a>
+ - <a href="#api_nan_get_external_value"><b><code>Nan::GetExternalValue()</code></b></a>
 
 
 <a name="api_nan_gc_callback"></a>
@@ -197,3 +198,14 @@ int Nan::AdjustExternalMemory(int bytesChange)
 
 Calls V8's [`AdjustAmountOfExternalAllocatedMemory()`](https://v8docs.nodesource.com/node-8.16/d5/dda/classv8_1_1_isolate.html#ae1a59cac60409d3922582c4af675473e).
 
+<a name="api_nan_get_external_value"></a>
+### Nan::GetExternalValue()
+
+Reads the pointer stored in a `v8::External`. On V8 versions that require an `ExternalPointerTypeTag` on `v8::External::Value()`, the default tag is applied (matching the tag used when the External is created via `Nan::New<v8::External>()`).
+
+Signature:
+
+```c++
+void* Nan::GetExternalValue(v8::Local<v8::External> ext)
+```
+
diff --git a/nan_callbacks_12_inl.h b/nan_callbacks_12_inl.h
index ff3b654d..bc18c837 100644
--- a/nan_callbacks_12_inl.h
+++ b/nan_callbacks_12_inl.h
@@ -178,14 +178,27 @@ class PropertyCallbackInfo {
   NAN_DISALLOW_ASSIGN_COPY_MOVE(PropertyCallbackInfo)
 };
 
+// Gated on V8_EXTERNAL_POINTER_TAG_COUNT (defined alongside the tagged
+// Value() API) rather than a V8_MAJOR_VERSION cutoff, since Node and
+// Chromium/Electron ship divergent V8 snapshots under the same major.
+// Tag must match the one used by imp::NewExternal.
+inline void* GetExternalValue(v8::Local<v8::External> ext) {
+#ifdef V8_EXTERNAL_POINTER_TAG_COUNT
+  return ext->Value(v8::kExternalPointerTypeTagDefault);
+#else
+  return ext->Value();
+#endif
+}
+
 namespace imp {
+
 static
 void FunctionCallbackWrapper(const v8::FunctionCallbackInfo<v8::Value> &info) {
   v8::Local<v8::Object> obj = info.Data().As<v8::Object>();
   FunctionCallback callback = reinterpret_cast<FunctionCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kFunctionIndex)
-          .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kFunctionIndex)
+          .As<v8::Value>().As<v8::External>())));
   FunctionCallbackInfo<v8::Value>
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   callback(cbinfo);
@@ -203,8 +216,8 @@ void GetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   GetterCallback callback = reinterpret_cast<GetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kGetterIndex)
-          .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kGetterIndex)
+          .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -221,8 +234,8 @@ void SetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   SetterCallback callback = reinterpret_cast<SetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kSetterIndex)
-          .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kSetterIndex)
+          .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), value, cbinfo);
 }
 
@@ -240,8 +253,8 @@ void GetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   GetterCallback callback = reinterpret_cast<GetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kGetterIndex)
-          .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kGetterIndex)
+          .As<v8::Value>().As<v8::External>())));
   callback(property, cbinfo);
 }
 
@@ -258,8 +271,8 @@ void SetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   SetterCallback callback = reinterpret_cast<SetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kSetterIndex)
-          .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kSetterIndex)
+          .As<v8::Value>().As<v8::External>())));
   callback(property, value, cbinfo);
 }
 
@@ -282,8 +295,8 @@ v8::Intercepted PropertyGetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyGetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyGetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -300,8 +313,8 @@ v8::Intercepted PropertySetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertySetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertySetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(property.As<v8::String>(), value, cbinfo);
 }
 
@@ -320,8 +333,8 @@ void PropertyGetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyGetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyGetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -338,8 +351,8 @@ void PropertySetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertySetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertySetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), value, cbinfo);
 }
 
@@ -357,8 +370,8 @@ void PropertyEnumeratorCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyEnumeratorCallback callback =
       reinterpret_cast<PropertyEnumeratorCallback>(reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyEnumeratorIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyEnumeratorIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(cbinfo);
 }
 
@@ -376,8 +389,8 @@ v8::Intercepted PropertyDeleterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyDeleterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyDeleterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -394,8 +407,8 @@ v8::Intercepted PropertyQueryCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyQueryIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyQueryIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -411,8 +424,8 @@ void PropertyDeleterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyDeleterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyDeleterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -428,8 +441,8 @@ void PropertyQueryCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyQueryIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyQueryIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property.As<v8::String>(), cbinfo);
 }
 
@@ -446,8 +459,8 @@ void PropertyGetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyGetterCallback callback = reinterpret_cast<PropertyGetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyGetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyGetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property, cbinfo);
 }
 
@@ -464,8 +477,8 @@ void PropertySetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertySetterCallback callback = reinterpret_cast<PropertySetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertySetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertySetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property, value, cbinfo);
 }
 
@@ -482,8 +495,8 @@ void PropertyEnumeratorCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyEnumeratorCallback callback =
       reinterpret_cast<PropertyEnumeratorCallback>(reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyEnumeratorIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyEnumeratorIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(cbinfo);
 }
 
@@ -499,8 +512,8 @@ void PropertyDeleterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyDeleterCallback callback = reinterpret_cast<PropertyDeleterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyDeleterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyDeleterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property, cbinfo);
 }
 
@@ -516,8 +529,8 @@ void PropertyQueryCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   PropertyQueryCallback callback = reinterpret_cast<PropertyQueryCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kPropertyQueryIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kPropertyQueryIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(property, cbinfo);
 }
 
@@ -535,8 +548,8 @@ v8::Intercepted IndexGetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexGetterCallback callback = reinterpret_cast<IndexGetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyGetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertyGetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(index, cbinfo);
 }
 
@@ -553,8 +566,8 @@ v8::Intercepted IndexSetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexSetterCallback callback = reinterpret_cast<IndexSetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertySetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertySetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(index, value, cbinfo);
 }
 
@@ -572,8 +585,8 @@ void IndexGetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexGetterCallback callback = reinterpret_cast<IndexGetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyGetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertyGetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(index, cbinfo);
 }
 
@@ -589,8 +602,8 @@ void IndexSetterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexSetterCallback callback = reinterpret_cast<IndexSetterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertySetterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertySetterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(index, value, cbinfo);
 }
 
@@ -609,9 +622,9 @@ void IndexEnumeratorCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexEnumeratorCallback callback = reinterpret_cast<IndexEnumeratorCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(
+          Nan::GetExternalValue(obj->GetInternalField(
               kIndexPropertyEnumeratorIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+              .As<v8::Value>().As<v8::External>())));
   callback(cbinfo);
 }
 
@@ -628,8 +641,9 @@ v8::Intercepted IndexDeleterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexDeleterCallback callback = reinterpret_cast<IndexDeleterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyDeleterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(
+              kIndexPropertyDeleterIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(index, cbinfo);
 }
 
@@ -644,8 +658,8 @@ v8::Intercepted IndexQueryCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexQueryCallback callback = reinterpret_cast<IndexQueryCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyQueryIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertyQueryIndex)
+              .As<v8::Value>().As<v8::External>())));
   return callback(index, cbinfo);
 }
 
@@ -660,8 +674,9 @@ void IndexDeleterCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexDeleterCallback callback = reinterpret_cast<IndexDeleterCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyDeleterIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(
+              kIndexPropertyDeleterIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(index, cbinfo);
 }
 
@@ -676,8 +691,8 @@ void IndexQueryCallbackWrapper(
       cbinfo(info, obj->GetInternalField(kDataIndex).As<v8::Value>());
   IndexQueryCallback callback = reinterpret_cast<IndexQueryCallback>(
       reinterpret_cast<intptr_t>(
-          obj->GetInternalField(kIndexPropertyQueryIndex)
-              .As<v8::Value>().As<v8::External>()->Value()));
+          Nan::GetExternalValue(obj->GetInternalField(kIndexPropertyQueryIndex)
+              .As<v8::Value>().As<v8::External>())));
   callback(index, cbinfo);
 }
 
diff --git a/nan_callbacks_pre_12_inl.h b/nan_callbacks_pre_12_inl.h
index 74861e20..9195e3fc 100644
--- a/nan_callbacks_pre_12_inl.h
+++ b/nan_callbacks_pre_12_inl.h
@@ -287,6 +287,10 @@ class PropertyCallbackInfo<v8::Integer> :
   }
 };
 
+inline void* GetExternalValue(v8::Local<v8::External> ext) {
+  return ext->Value();
+}
+
 namespace imp {
 template<typename T>
 class ReturnValueImp : public ReturnValue<T> {
diff --git a/nan_implementation_12_inl.h b/nan_implementation_12_inl.h
index 255293ac..79731c76 100644
--- a/nan_implementation_12_inl.h
+++ b/nan_implementation_12_inl.h
@@ -14,6 +14,22 @@
 
 namespace imp {
 
+// Recent V8 versions (currently Chromium/Electron's V8 snapshot; not yet in
+// any released Node) gained an ExternalPointerTypeTag parameter on
+// v8::External::New().  Detect that API via the V8_EXTERNAL_POINTER_TAG_COUNT
+// macro (defined in <v8-internal.h> alongside the new signature) rather than
+// a V8_MAJOR_VERSION cutoff, since Node and Chromium ship divergent V8
+// snapshots under the same major version.  Externals created via this helper
+// are read back through imp::GetExternalPointer in nan_callbacks_12_inl.h,
+// which uses the matching kExternalPointerTypeTagDefault tag.
+inline v8::Local<v8::External> NewExternal(v8::Isolate* isolate, void* value) {
+#ifdef V8_EXTERNAL_POINTER_TAG_COUNT
+  return v8::External::New(isolate, value, v8::kExternalPointerTypeTagDefault);
+#else
+  return v8::External::New(isolate, value);
+#endif
+}
+
 //=== Array ====================================================================
 
 Factory<v8::Array>::return_t
@@ -76,7 +92,7 @@ Factory<v8::Date>::New(double value) {
 
 Factory<v8::External>::return_t
 Factory<v8::External>::New(void * value) {
-  return v8::External::New(v8::Isolate::GetCurrent(), value);
+  return imp::NewExternal(v8::Isolate::GetCurrent(), value);
 }
 
 //=== Function =================================================================
@@ -92,7 +108,7 @@ Factory<v8::Function>::New( FunctionCallback callback
 
   obj->SetInternalField(
       imp::kFunctionIndex
-    , v8::External::New(isolate, reinterpret_cast<void *>(callback)));
+    , imp::NewExternal(isolate, reinterpret_cast<void *>(callback)));
 
   v8::Local<v8::Value> val = v8::Local<v8::Value>::New(isolate, data);
 
@@ -128,7 +144,7 @@ Factory<v8::FunctionTemplate>::New( FunctionCallback callback
 
     obj->SetInternalField(
         imp::kFunctionIndex
-      , v8::External::New(isolate, reinterpret_cast<void *>(callback)));
+      , imp::NewExternal(isolate, reinterpret_cast<void *>(callback)));
     v8::Local<v8::Value> val = v8::Local<v8::Value>::New(isolate, data);
 
     if (!val.IsEmpty()) {
diff --git a/test/cpp/nannew.cpp b/test/cpp/nannew.cpp
index e36ce4f8..8c6c6c10 100644
--- a/test/cpp/nannew.cpp
+++ b/test/cpp/nannew.cpp
@@ -136,7 +136,7 @@ NAN_METHOD(testExternal) {
 
   t.plan(2);
 
-  t.ok(_(New<External>(&ttt)->Value() == &ttt));
+  t.ok(_(GetExternalValue(New<External>(&ttt)) == &ttt));
   t.ok(_( assertType<External>(New<External>(&ttt))));
 
   info.GetReturnValue().SetUndefined();
diff --git a/test/cpp/news.cpp b/test/cpp/news.cpp
index 3597f0fc..eb2febcb 100644
--- a/test/cpp/news.cpp
+++ b/test/cpp/news.cpp
@@ -93,7 +93,7 @@ NAN_METHOD(NewBooleanObject) {
 
 NAN_METHOD(NewExternal) {
   v8::Local<v8::External> ext = New<v8::External>(&magic);
-  assert(*static_cast<int *>(ext->Value()) == 1337);
+  assert(*static_cast<int *>(GetExternalValue(ext)) == 1337);
   info.GetReturnValue().Set(New("passed").ToLocalChecked());
 }