diff --git a/script/tool/README.md b/script/tool/README.md
index 551836e95341..b8f00c9459cc 100644
--- a/script/tool/README.md
+++ b/script/tool/README.md
@@ -47,6 +47,8 @@ anywhere within a package).
 dart run script/tool/bin/flutter_plugin_tools.dart format --packages package_name
 ```
 
+The `flutter/packages` repository uses clang version `15.0.0` . Newer versions of clang may format code differently.
+
 ### Run the Dart Static Analyzer
 
 ```sh