diff --git a/actioncable/lib/action_cable/remote_connections.rb b/actioncable/lib/action_cable/remote_connections.rb
index a92b5e90b4c8e9622046cc0b064e55cfef4ee774..a07a517092c14055d2c775e3415c7926e85c966d 100644
--- a/actioncable/lib/action_cable/remote_connections.rb
+++ b/actioncable/lib/action_cable/remote_connections.rb
@@ -51,9 +51,10 @@ def disconnect
           server.connection_identifiers
         end
 
-        private
+        protected
           attr_reader :server
 
+        private
           def set_identifier_instance_vars(ids)
             raise InvalidIdentifiersError unless valid_identifiers?(ids)
             ids.each { |k, v| instance_variable_set("@#{k}", v) }