diff --git a/plugins/commands/serve/command.rb b/plugins/commands/serve/command.rb
index 5cdb9941c..cae0e817f 100644
--- a/plugins/commands/serve/command.rb
+++ b/plugins/commands/serve/command.rb
@@ -128,6 +128,7 @@ module VagrantPlugins
         STDOUT.flush
         logger.info("Vagrant GRPC service is now running addr=#{bind_addr.inspect} port=#{port.inspect}")
         s.run_till_terminated_or_interrupted([1, 'int', 'SIGQUIT', 'SIGINT'])
+        1
       ensure
         logger.info("Vagrant GRPC service is shutting down")
       end