2 files changed, 2 insertions, 2 deletions
diff --git a/Library/Homebrew/os/mac/keg.rb b/Library/Homebrew/os/mac/keg.rb
index dcda0908b..201c57b50 100644
--- a/Library/Homebrew/os/mac/keg.rb
+++ b/Library/Homebrew/os/mac/keg.rb
@@ -1,5 +1,5 @@
 class Keg
-  if ENV["HOMEBREW_RUBY_MACHO"]
+  if !ENV["HOMEBREW_NO_RUBY_MACHO"]
     require "os/mac/ruby_keg"
     include RubyKeg
   else
diff --git a/Library/Homebrew/os/mac/pathname.rb b/Library/Homebrew/os/mac/pathname.rb
index 87fc72936..b76c4333a 100644
--- a/Library/Homebrew/os/mac/pathname.rb
+++ b/Library/Homebrew/os/mac/pathname.rb
@@ -1,7 +1,7 @@
 require "os/mac/shared_mach"
 
 class Pathname
-  if ENV["HOMEBREW_RUBY_MACHO"]
+  if !ENV["HOMEBREW_NO_RUBY_MACHO"]
     require "os/mac/ruby_mach"
     include RubyMachO
   else