1 files changed, 4 insertions, 0 deletions
diff --git a/actioncable/lib/action_cable/subscription_adapter/base.rb b/actioncable/lib/action_cable/subscription_adapter/base.rb
index 11910803e8..796db5ffa3 100644
--- a/actioncable/lib/action_cable/subscription_adapter/base.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/base.rb
@@ -19,6 +19,10 @@ module ActionCable
       def unsubscribe(channel, message_callback)
         raise NotImplementedError
       end
+
+      def shutdown
+        raise NotImplementedError
+      end
     end
   end
 end