diff --git a/ios/sdk/WeexSDK/Sources/Model/WXSDKInstance.h b/ios/sdk/WeexSDK/Sources/Model/WXSDKInstance.h
index 16e1aa6f71..c6cf5215b8 100644
--- a/ios/sdk/WeexSDK/Sources/Model/WXSDKInstance.h
+++ b/ios/sdk/WeexSDK/Sources/Model/WXSDKInstance.h
@@ -154,7 +154,8 @@ typedef NS_ENUM(NSInteger, WXErrorCode) {//error.code
 };
 
 typedef enum : NSUInteger {
-    WXScrollerComponentCreatedCallback
+    WXScrollerComponentCreatedCallback,
+    WXTabbarComponentCreatedCallback
 } WXSDKInstanceCallbackType;