diff --git a/packages/smooth_app/lib/pages/scan/ml_kit_scan_page.dart b/packages/smooth_app/lib/pages/scan/ml_kit_scan_page.dart
index 8b6fe35587f..1596447dd8c 100644
--- a/packages/smooth_app/lib/pages/scan/ml_kit_scan_page.dart
+++ b/packages/smooth_app/lib/pages/scan/ml_kit_scan_page.dart
@@ -160,6 +160,7 @@ class MLKitScannerPageState extends State<MLKitScannerPage> {
       setState(() {});
     }
     await _controller?.dispose();
+    _controller?.removeListener(() {});
     _controller = null;
   }