diff --git a/Library/Homebrew/macos/xcode.rb b/Library/Homebrew/macos/xcode.rb
index c4b46fefb0..211062a82b 100644
--- a/Library/Homebrew/macos/xcode.rb
+++ b/Library/Homebrew/macos/xcode.rb
@@ -23,7 +23,7 @@ module MacOS::Xcode extend self
       when 10.6 then "3.2.6"
     else
       if MacOS.version >= 10.7
-        "4.5"
+        "4.5.1"
       else
         raise "Mac OS X `#{MacOS.version}' is invalid"
       end