diff --git a/src/backend/hook.js b/src/backend/hook.js
index d77c4a06b..e90b7d5ea 100644
--- a/src/backend/hook.js
+++ b/src/backend/hook.js
@@ -124,7 +124,7 @@ export function installHook (target) {
         store.registerModule = origRegister
         store.unregisterModule = origUnregister
       }
-      return hook.storeModules
+      return hook.storeModules || []
     }
   })