diff --git a/services/web/types/window.ts b/services/web/types/window.ts
index 5b2743063e..6b9b1d86f1 100644
--- a/services/web/types/window.ts
+++ b/services/web/types/window.ts
@@ -26,5 +26,6 @@ declare global {
       }
     }
     isRestrictedTokenMember: boolean
+    _reportCM6Perf: () => void
   }
 }