diff --git a/Library/Homebrew/cmd/cat.rb b/Library/Homebrew/cmd/cat.rb
index b7cfb1af96..b7d3976555 100644
--- a/Library/Homebrew/cmd/cat.rb
+++ b/Library/Homebrew/cmd/cat.rb
@@ -8,7 +8,7 @@ module Homebrew
       usage_banner <<~EOS
         `cat` <formula>
 
-        Display the source to <formula>.
+        Display the source of <formula>.
       EOS
     end
   end