diff --git a/Formula/readline.rb b/Formula/readline.rb
index 5c43f3f0d1..fabd2efa78 100644
--- a/Formula/readline.rb
+++ b/Formula/readline.rb
@@ -46,7 +46,7 @@ class Readline < Formula
   keg_only :shadowed_by_macos, <<~EOS
     macOS provides the BSD libedit library, which shadows libreadline.
     In order to prevent conflicts when programs look for libreadline we are
-    defaulting this GNU Readline installation to keg-only.
+    defaulting this GNU Readline installation to keg-only
   EOS
 
   def install