diff --git a/lib/fakefs/base.rb b/lib/fakefs/base.rb
index 48b76e0..ee4dc3e 100644
--- a/lib/fakefs/base.rb
+++ b/lib/fakefs/base.rb
@@ -2,8 +2,6 @@ RealFile            = File
 RealFileTest        = FileTest
 RealFileUtils       = FileUtils
 RealDir             = Dir
-RealFileUtils::Dir  = RealDir
-RealFileUtils::File = RealFile
 
 module FakeFS
   def self.activate!