diff --git a/src/operators/window.ts b/src/operators/window.ts
index 2e19dd224b..e73d77dc36 100644
--- a/src/operators/window.ts
+++ b/src/operators/window.ts
@@ -62,4 +62,12 @@ class WindowClosingNotifierSubscriber<T> extends Subscriber<T> {
   _next() {
     this.parent.openWindow();
   }
+
+  _error(err: any) {
+    this.parent._error(err);
+  }
+
+  _complete() {
+    this.parent._complete();
+  }
 }
\ No newline at end of file