diff --git a/src/core/observer/dep.ts b/src/core/observer/dep.ts
index 205efbbf5a0..aadcd985e00 100644
--- a/src/core/observer/dep.ts
+++ b/src/core/observer/dep.ts
@@ -82,7 +82,7 @@ export default class Dep {
       if (__DEV__ && info) {
         sub.onTrigger &&
           sub.onTrigger({
-            effect: subs[i],
+            effect: sub,
             ...info
           })
       }