diff --git a/packages/fineui/src/fix/fix.js b/packages/fineui/src/fix/fix.js
index a28f5e4a8..ddc37b044 100644
--- a/packages/fineui/src/fix/fix.js
+++ b/packages/fineui/src/fix/fix.js
@@ -7,7 +7,7 @@ const pendingCleanupDeps = [];
 const cleanupDeps = () => {
     for (let i = 0; i < pendingCleanupDeps.length; i++) {
         const dep = pendingCleanupDeps[i];
-        dep.subs = dep.subs.filter(s => s);
+        dep.subs = dep.subs.filter(s => dep.subsSet.has(s.id));
         dep._pending = false;
     }
     pendingCleanupDeps.length = 0;
@@ -23,14 +23,16 @@ class Dep {
         this.id = uid++;
         this._pending = false;
         this.subs = [];
+        this.subsSet = new Set();
     }
 
     addSub(sub) {
         this.subs.push(sub);
+        this.subsSet.add(sub.id);
     }
 
     removeSub(sub) {
-        this.subs[this.subs.indexOf(sub)] = null;
+        this.subsSet.delete(sub.id);
         if (!this._pending) {
             this._pending = true;
             pendingCleanupDeps.push(this);
@@ -45,7 +47,7 @@ class Dep {
 
     notify(options) {
         // stabilize the subscriber list first
-        const subs = this.subs.filter(s => s);
+        const subs = this.subs.filter(s => this.subsSet.has(s.id));
         for (let i = 0, l = subs.length; i < l; i++) {
             subs[i].update(options);
         }