diff --git a/packages/core/ui/page/page-common.ts b/packages/core/ui/page/page-common.ts
index 62c574842..72397285c 100644
--- a/packages/core/ui/page/page-common.ts
+++ b/packages/core/ui/page/page-common.ts
@@ -94,7 +94,7 @@ export class PageBase extends ContentView {
 	get frame(): Frame {
 		const frame = this.parent;
 
-		return frame instanceof Frame ? frame : undefined;
+		return (frame && frame.constructor.name === 'Frame') ? frame as Frame : undefined;
 	}
 
 	private createNavigatedData(eventName: string, isBackNavigation: boolean): NavigatedData {