diff --git a/railties/Rakefile b/railties/Rakefile
index ef673c234ece4b632af8f768b5786bb872037b67..4eaa1bef63fa279c4173a6b7e2d30ccbfb493f61 100644
--- a/railties/Rakefile
+++ b/railties/Rakefile
@@ -255,7 +255,7 @@ task :generate_rails_framework_doc do
 end
 
 task :generate_app_doc do
-  File.cp "doc/README_FOR_APP", "#{PKG_DESTINATION}/doc/README_FOR_APP"
+  cp "doc/README_FOR_APP", "#{PKG_DESTINATION}/doc/README_FOR_APP"
   system %{cd #{PKG_DESTINATION}; rake doc:app}
 end