diff --git a/src/node.h b/src/node.h
index d43693c03389ef..a34bdfb1a9eaed 100644
--- a/src/node.h
+++ b/src/node.h
@@ -401,7 +401,7 @@ NODE_EXTERN MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform();
 NODE_EXTERN MultiIsolatePlatform* CreatePlatform(
     int thread_pool_size,
     node::tracing::TracingController* tracing_controller);
-MultiIsolatePlatform* InitializeV8Platform(int thread_pool_size);
+NODE_EXTERN MultiIsolatePlatform* InitializeV8Platform(int thread_pool_size);
 NODE_EXTERN void FreePlatform(MultiIsolatePlatform* platform);
 
 NODE_EXTERN void EmitBeforeExit(Environment* env);