diff --git a/packages/behavior/item/actions.js b/packages/behavior/item/actions.js
index b53fa7a..80a0226 100644
--- a/packages/behavior/item/actions.js
+++ b/packages/behavior/item/actions.js
@@ -16,7 +16,7 @@ export class Actions extends decorate(Traversals) {
   constructor() {
     super();
     this._index = 0;
-    this.pending = null;
+    this._pending = null;
   }
 
   emitFinished() {
@@ -40,9 +40,9 @@ export class Actions extends decorate(Traversals) {
       this.emitFinished();
       return;
     }
-    if (this.pending) {
-      if (this.pending instanceof TickingPromise) {
-        this.pending.tick(elapsed);
+    if (this._pending) {
+      if (this._pending instanceof TickingPromise) {
+        this._pending.tick(elapsed);
       }
       return;
     }
@@ -59,7 +59,7 @@ export class Actions extends decorate(Traversals) {
           console.error(error);
           this.prologue();
         });
-        this.pending = result;
+        this._pending = result;
         break;
       }
       this.prologue();
@@ -77,7 +77,7 @@ export class Actions extends decorate(Traversals) {
   }
 
   prologue() {
-    this.pending = null;
+    this._pending = null;
     if (0 === (this.index = (this.index + 1) % this.traversals.length)) {
       this.emitFinished();
     }