diff --git a/lib/qr_code_scanner/lib/src/scanner.dart b/lib/qr_code_scanner/lib/src/scanner.dart
index c309994de..0a2f1e42a 100644
--- a/lib/qr_code_scanner/lib/src/scanner.dart
+++ b/lib/qr_code_scanner/lib/src/scanner.dart
@@ -51,6 +51,7 @@ class _ScannerState extends State<Scanner> {
   void initState() {
     super.initState();
     controller = widget.mockController ?? MobileScannerController();
+    controller.start();
     listenToDetections();
   }