diff --git a/kamailio/nat-traversal-role.cfg b/kamailio/nat-traversal-role.cfg
index 210d7bc..1e282e7 100644
--- a/kamailio/nat-traversal-role.cfg
+++ b/kamailio/nat-traversal-role.cfg
@@ -13,7 +13,7 @@ modparam("nathelper", "sipping_from", "sip:sipcheck@MY_HOSTNAME")
 #!endif
 
 #!trydef KZ_NAT_FIX_SDP_REQUEST 1
-#!trydef KZ_NAT_FIX_SDP_REPLY 1
+#!trydef KZ_NAT_FIX_SDP_REPLY 0
 #!trydef KZ_NAT_SDP_TEST 8
 #!trydef KZ_NAT_SDP_FIX 10