1 files changed, 9 insertions, 1 deletions
diff --git a/railties/lib/rails/deprecation.rb b/railties/lib/rails/deprecation.rb
index 42bba151d6..3c5b8bdec7 100644
--- a/railties/lib/rails/deprecation.rb
+++ b/railties/lib/rails/deprecation.rb
@@ -14,4 +14,12 @@ RAILS_ROOT = (Class.new(ActiveSupport::Deprecation::DeprecationProxy) do
     msg = "RAILS_ROOT is deprecated! Use Rails.root instead."
     ActiveSupport::Deprecation.warn(msg, callstack)
   end
-end).new
-\ No newline at end of file
+end).new
+
+module Rails
+  class Configuration
+    def gem(*args)
+      ActiveSupport::Deprecation.warn("config.gem has been deprecated in favor of the Gemfile.")
+    end
+  end
+end
+\ No newline at end of file