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-rw-r--r--railties/lib/generators/rails/metal/templates/metal.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/railties/lib/generators/rails/metal/templates/metal.rb b/railties/lib/generators/rails/metal/templates/metal.rb
index 2f5d4e7593..8cc3f1f258 100644
--- a/railties/lib/generators/rails/metal/templates/metal.rb
+++ b/railties/lib/generators/rails/metal/templates/metal.rb
@@ -1,5 +1,5 @@
# Allow the metal piece to run in isolation
-require File.expand_path('../../../config/environment', __FILE__)
+require File.expand_path('../../../config/environment', __FILE__) unless defined?(Rails)
class <%= class_name %>
def self.call(env)