diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index 80f93ab8f8..72e937576d 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -218,7 +218,7 @@ module OS
       end
 
       def detect_version
-        [STANDALONE_PKG_ID, FROM_XCODE_PKG_ID, MAVERICKS_PKG_ID].find do |id|
+        [MAVERICKS_PKG_ID, STANDALONE_PKG_ID, FROM_XCODE_PKG_ID].find do |id|
           version = MacOS.pkgutil_info(id)[/version: (.+)$/, 1]
           return version if version
         end