diff --git a/components/_util/resizeObserver.tsx b/components/_util/resizeObserver.tsx
index de7f4c1f24..3fd815c7cd 100644
--- a/components/_util/resizeObserver.tsx
+++ b/components/_util/resizeObserver.tsx
@@ -53,7 +53,7 @@ class ReactResizeObserver extends React.Component<ResizeObserverProps, {}> {
   }
 
   render() {
-    const { children } = this.props;
+    const { children = null } = this.props;
     return children;
   }
 }