diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index aeb24efc58..2ace45b8ec 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -212,7 +212,7 @@ Please take one of the following actions:
   def cxx;     self['CXX'] or "g++"; end
   def cflags;  self['CFLAGS'];       end
   def cxxflags;self['CXXFLAGS'];     end
-  def cppflags;self['CPPLAGS'];      end
+  def cppflags;self['CPPFLAGS'];      end
   def ldflags; self['LDFLAGS'];      end
 
   def m64