diff -up dovecot-2.1.6/src/master/service-listen.c.systemdfix dovecot-2.1.6/src/master/service-listen.c
--- dovecot-2.1.6/src/master/service-listen.c.systemdfix	2012-05-04 23:14:02.000000000 +0200
+++ dovecot-2.1.6/src/master/service-listen.c	2012-05-09 13:07:39.827730993 +0200
@@ -339,7 +339,7 @@ int services_listen(struct service_list
 	}
 
 #ifdef HAVE_SYSTEMD
-	if (ret == 0)
+ 	if (ret > 0)
 		services_verify_systemd(service_list);
 #endif
 	return ret;