diff --git a/src/d8.h b/src/d8.h
index 44ee09a..caa5a0a 100644
--- a/src/d8.h
+++ b/src/d8.h
@@ -263,7 +263,7 @@
   static int RunMain(Isolate* isolate, int argc, char* argv[]);
   static int Main(int argc, char* argv[]);
   static void Exit(int exit_code);
-  static void OnExit();
+  static void OnExit(Isolate* isolate);
 
 #ifndef V8_SHARED
   static Handle<Array> GetCompletions(Isolate* isolate,