diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 5ffa660ab6..a8e7d66101 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -14,7 +14,7 @@ class XcodeDependency < Requirement
 
   def message; <<-EOS.undent
     A full installation of Xcode.app is required to compile this software.
-    Installing just the Command Line Tools is not sufficent.
+    Installing just the Command Line Tools is not sufficient.
     EOS
   end
 end