Another typo
diff --git a/packages/flutter/README.md b/packages/flutter/README.md
index f79eeaf..19cca8b 100644
--- a/packages/flutter/README.md
+++ b/packages/flutter/README.md
@@ -7,7 +7,7 @@
  - Ensure that `$DART_SDK` is set to the path of your Dart SDK and that the
    `dart` and `pub` executables are on your `$PATH`.
 
-Once you have instealled Dart SDK, create a new directory and adding a
+Once you have installed Dart SDK, create a new directory and adding a
 [pubspec.yaml](https://www.dartlang.org/tools/pub/pubspec.html):
 
 ```yaml