diff --git a/src/node_api.cc b/src/node_api.cc
index b293272b911c44..8df4559c6cddc6 100644
--- a/src/node_api.cc
+++ b/src/node_api.cc
@@ -26,7 +26,7 @@ struct node_napi_env__ : public napi_env__ {
   }
 
   v8::Maybe<bool> mark_arraybuffer_as_untransferable(
-      v8::Local<v8::ArrayBuffer> ab) const {
+      v8::Local<v8::ArrayBuffer> ab) const override {
     return ab->SetPrivate(
         context(),
         node_env()->arraybuffer_untransferable_private_symbol(),