diff --git a/packages/flutter/lib/src/material/snack_bar.dart b/packages/flutter/lib/src/material/snack_bar.dart
index 09c934e708..fb6441430d 100644
--- a/packages/flutter/lib/src/material/snack_bar.dart
+++ b/packages/flutter/lib/src/material/snack_bar.dart
@@ -107,7 +107,7 @@ class SnackBarAction extends StatefulWidget {
   final VoidCallback onPressed;
 
   @override
-  _SnackBarActionState createState() => _SnackBarActionState();
+  State<SnackBarAction> createState() => _SnackBarActionState();
 }
 
 class _SnackBarActionState extends State<SnackBarAction> {