diff --git a/src/core/components/pubsub.js b/src/core/components/pubsub.js
index 9796faf479..7e51062f40 100644
--- a/src/core/components/pubsub.js
+++ b/src/core/components/pubsub.js
@@ -24,7 +24,7 @@ module.exports = function pubsub (self) {
         }
 
         self._pubsub.on(topic, handler)
-        setImmediate(() => callback())
+        setImmediate(cb)
       }
 
       if (!callback) {