diff --git a/openbsc/include/openbsc/mgcp_internal.h b/openbsc/include/openbsc/mgcp_internal.h
index 434b46c..6778064 100644
--- a/openbsc/include/openbsc/mgcp_internal.h
+++ b/openbsc/include/openbsc/mgcp_internal.h
@@ -253,6 +253,8 @@
 			const uint16_t seq, const int32_t transit,
 			const uint32_t ssrc);
 
+int mgcp_set_ip_tos(int fd, int tos);
+
 enum {
 	MGCP_DEST_NET = 0,
 	MGCP_DEST_BTS,
diff --git a/openbsc/src/libmgcp/mgcp_network.c b/openbsc/src/libmgcp/mgcp_network.c
index 37fc59a..c3f43dd 100644
--- a/openbsc/src/libmgcp/mgcp_network.c
+++ b/openbsc/src/libmgcp/mgcp_network.c
@@ -901,7 +901,7 @@
 	return 0;
 }
 
-static int set_ip_tos(int fd, int tos)
+int mgcp_set_ip_tos(int fd, int tos)
 {
 	int ret;
 	ret = setsockopt(fd, IPPROTO_IP, IP_TOS,
@@ -925,8 +925,8 @@
 		goto cleanup1;
 	}
 
-	set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp);
-	set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp);
+	mgcp_set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp);
+	mgcp_set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp);
 
 	rtp_end->rtp.when = BSC_FD_READ;
 	if (osmo_fd_register(&rtp_end->rtp) != 0) {
diff --git a/openbsc/src/libmgcp/mgcp_osmux.c b/openbsc/src/libmgcp/mgcp_osmux.c
index d5e671d..7f61173 100644
--- a/openbsc/src/libmgcp/mgcp_osmux.c
+++ b/openbsc/src/libmgcp/mgcp_osmux.c
@@ -420,6 +420,7 @@
 		LOGP(DMGCP, LOGL_ERROR, "cannot bind OSMUX socket\n");
 		return ret;
 	}
+	mgcp_set_ip_tos(osmux_fd.fd, cfg->endp_dscp);
 	osmux_fd.when |= BSC_FD_READ;
 
 	ret = osmo_fd_register(&osmux_fd);
diff --git a/openbsc/src/libmgcp/mgcp_vty.c b/openbsc/src/libmgcp/mgcp_vty.c
index 5124ca6..3d99c83 100644
--- a/openbsc/src/libmgcp/mgcp_vty.c
+++ b/openbsc/src/libmgcp/mgcp_vty.c
@@ -378,7 +378,7 @@
       cfg_mgcp_rtp_ip_dscp_cmd,
       "rtp ip-dscp <0-255>",
       RTP_STR
-      "Apply IP_TOS to the audio stream\n" "The DSCP value\n")
+      "Apply IP_TOS to the audio stream (including Osmux)\n" "The DSCP value\n")
 {
 	int dscp = atoi(argv[0]);
 	g_cfg->endp_dscp = dscp;