Index: main/rtp.c
===================================================================
--- main/rtp.c	(revision 94191)
+++ main/rtp.c	(working copy)
@@ -1632,6 +1632,7 @@
 	{{1, AST_FORMAT_G722}, "audio", "G722"},
 	{{1, AST_FORMAT_G726_AAL2}, "audio", "AAL2-G726-32"},
 	{{0, AST_RTP_DTMF}, "audio", "telephone-event"},
+	{{0, AST_RTP_DTMF}, "audio", "X-NSE"},
 	{{0, AST_RTP_CISCO_DTMF}, "audio", "cisco-telephone-event"},
 	{{0, AST_RTP_CN}, "audio", "CN"},
 	{{1, AST_FORMAT_JPEG}, "video", "JPEG"},