diff --git a/packages/nerv-shared/src/index.ts b/packages/nerv-shared/src/index.ts
index f438d88a..32f2d7ca 100644
--- a/packages/nerv-shared/src/index.ts
+++ b/packages/nerv-shared/src/index.ts
@@ -149,7 +149,7 @@ export function isVText (node): node is VText {
 }
 
 export function isComponent (instance): instance is Component<any, any> {
-  return !isInvalid(instance) && instance.isReactComponent === EMPTY_OBJ
+  return !isInvalid(instance) && !isNullOrUndef(instance.isReactComponent)
 }
 
 export function isWidget (
diff --git a/packages/nerv/src/component.ts b/packages/nerv/src/component.ts
index e55a289c..84e119e8 100644
--- a/packages/nerv/src/component.ts
+++ b/packages/nerv/src/component.ts
@@ -22,7 +22,9 @@ class Component<P, S> implements ComponentLifecycle<P, S> {
   // Is a React Component.
   // tslint:disable-next-line:max-line-length
   // see: https://github.com/facebook/react/blob/3c977dea6b96f6a9bb39f09886848da870748441/packages/react/src/ReactBaseClasses.js#L26
-  isReactComponent = EMPTY_OBJ
+  isReactComponent () {
+    return true;
+  }
 
   constructor (props?: P, context?: any) {
     if (!this.state) {