--- a/util/prosodyctl/check.lua	Fri May 07 16:47:58 2021 +0200
+++ b/util/prosodyctl/check.lua	Thu May 13 11:17:13 2021 +0100
@@ -47,7 +47,7 @@
 			"umask", "prosodyctl_timeout", "use_ipv6", "use_libevent", "network_settings",
 			"network_backend", "http_default_host",
 			"statistics_interval", "statistics", "statistics_config",
-			"plugin_server", "installer_plugin_path",
+			"plugin_server", "installer_plugin_path", "gc"
 		});
 		local config = configmanager.getconfig();
 		-- Check that we have any global options (caused by putting a host at the top)