diff --git a/Library/Homebrew/cli/args.rbi b/Library/Homebrew/cli/args.rbi
index 80e172e8d8..004dc2fb22 100644
--- a/Library/Homebrew/cli/args.rbi
+++ b/Library/Homebrew/cli/args.rbi
@@ -290,6 +290,9 @@ module Homebrew
 
       sig { returns(T.nilable(T::Array[String])) }
       def groups; end
+
+      sig { returns(T::Boolean) }
+      def write_only?; end
     end
   end
 end