diff --git a/components/drawer/nz-drawer.component.ts b/components/drawer/nz-drawer.component.ts
index 0a6aab850ce..8dc0ba4511b 100644
--- a/components/drawer/nz-drawer.component.ts
+++ b/components/drawer/nz-drawer.component.ts
@@ -250,7 +250,9 @@ export class NzDrawerComponent<T = any, R = any, D = any> extends NzDrawerRef<R>
   }
 
   private disposeOverlay(): void {
-    this.overlayRef.dispose();
+    if (this.overlayRef) {
+      this.overlayRef.dispose();
+    }
     this.overlayRef = null;
   }