diff --git a/kamailio/defs.cfg b/kamailio/defs.cfg
index da6d4db..d9c349e 100644
--- a/kamailio/defs.cfg
+++ b/kamailio/defs.cfg
@@ -51,7 +51,7 @@
 #!define BLF_USE_SINGLE_DIALOG 1
 #!endif
 
-#ifndef MY_AMQP_ZONE
+#!ifndef MY_AMQP_ZONE
 #!define MY_AMQP_ZONE "local"
 #!endif