diff --git a/src/fb-stubs/GK.js b/src/fb-stubs/GK.js
index 9c3663090..3e4eef4c4 100644
--- a/src/fb-stubs/GK.js
+++ b/src/fb-stubs/GK.js
@@ -21,6 +21,6 @@ export default class GK {
   }
 
   static serializeGKs() {
-    return JSON.stringify({});
+    return '';
   }
 }