diff --git a/rpc/ruby-server/rpc-helper.rb b/rpc/ruby-server/rpc-helper.rb
index 2926310..34c4125 100644
--- a/rpc/ruby-server/rpc-helper.rb
+++ b/rpc/ruby-server/rpc-helper.rb
@@ -75,7 +75,7 @@ def self.serve(opts = {}, &compute)
             main_channel.reject(delivery_info.delivery_tag, true)
           end
         end
-
+      ensure
         private_channel.close if use_thread_pool && private_channel
       end
     end