diff --git a/packages/flutter/lib/src/material/app_bar.dart b/packages/flutter/lib/src/material/app_bar.dart
index f7cc1bafeb..57174c5e5b 100644
--- a/packages/flutter/lib/src/material/app_bar.dart
+++ b/packages/flutter/lib/src/material/app_bar.dart
@@ -287,7 +287,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// The primary widget displayed in the app bar.
   ///
   /// Becomes the middle component of the [NavigationToolbar] built by this widget.
-  //.
+  ///
   /// Typically a [Text] widget that contains a description of the current
   /// contents of the app.
   /// {@endtemplate}