diff --git a/openbsc/include/openbsc/mncc.h b/openbsc/include/openbsc/mncc.h
index ffac7fd..46ba237 100644
--- a/openbsc/include/openbsc/mncc.h
+++ b/openbsc/include/openbsc/mncc.h
@@ -92,6 +92,9 @@
 #define MNCC_FRAME_RECV		0x0201
 #define MNCC_FRAME_DROP		0x0202
 #define MNCC_LCHAN_MODIFY	0x0203
+#define MNCC_RTP_CREATE		0x0204
+#define MNCC_RTP_CONNECT	0x0205
+#define MNCC_RTP_FREE		0x0206
 
 #define GSM_TCHF_FRAME		0x0300
 #define GSM_TCHF_FRAME_EFR	0x0301
@@ -163,7 +166,7 @@
 	unsigned char	data[0];
 };
 
-#define MNCC_SOCK_VERSION	4
+#define MNCC_SOCK_VERSION	5
 struct gsm_mncc_hello {
 	uint32_t	msg_type;
 	uint32_t	version;
@@ -179,6 +182,15 @@
 	uint32_t	lchan_type_offset;
 };
 
+struct gsm_mncc_rtp {
+	uint32_t	msg_type;
+	uint32_t	callref;
+	uint32_t	ip;
+	uint16_t	port;
+	uint32_t	payload_type;
+	uint32_t	payload_msg_type;
+};
+
 char *get_mncc_name(int value);
 void mncc_set_cause(struct gsm_mncc *data, int loc, int val);
 void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg);
diff --git a/openbsc/src/libmsc/mncc.c b/openbsc/src/libmsc/mncc.c
index 73db5f0..2767faa 100644
--- a/openbsc/src/libmsc/mncc.c
+++ b/openbsc/src/libmsc/mncc.c
@@ -83,6 +83,9 @@
 	{"MNCC_FRAME_RECV",	0x0201},
 	{"MNCC_FRAME_DROP",	0x0202},
 	{"MNCC_LCHAN_MODIFY",	0x0203},
+	{"MNCC_RTP_CREATE",	0x0204},
+	{"MNCC_RTP_CONNECT",	0x0205},
+	{"MNCC_RTP_FREE",	0x0206},
 
 	{"GSM_TCHF_FRAME",	0x0300},
 	{"GSM_TCHF_FRAME_EFR",	0x0301},