1 files changed, 1 insertions, 1 deletions
diff --git a/dom/script/ModuleLoadRequest.h b/dom/script/ModuleLoadRequest.h
index eefb7dad5..4eac65090 100644
--- a/dom/script/ModuleLoadRequest.h
+++ b/dom/script/ModuleLoadRequest.h
@@ -56,7 +56,7 @@ public:
   ModuleLoadRequest(nsIURI* aURI,
                     ModuleLoadRequest* aParent);
 
-  bool IsTopLevel() const {
+  bool IsTopLevel() const override {
     return mIsTopLevel;
   }