diff --git a/Library/Homebrew/compat/macos.rb b/Library/Homebrew/compat/macos.rb
index 038cf9fb20..c6a7b0e732 100644
--- a/Library/Homebrew/compat/macos.rb
+++ b/Library/Homebrew/compat/macos.rb
@@ -1,3 +1,5 @@
+require "development_tools"
+
 module OS
   module Mac
     def xcode_folder