diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index 790434d5db..0e6931e706 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -104,6 +104,11 @@ module HomebrewEnvExtension
     remove_from_cflags(/-O./)
     append_to_cflags '-Os'
   end
+  def Og
+    # Sometimes you want a debug build
+    remove_from_cflags(/-O./)
+    append_to_cflags '-g -O0'
+  end
 
   def gcc_4_0_1
     self['CC'] = self['LD'] = '/usr/bin/gcc-4.0'