diff --git a/openbsc/src/libmgcp/mgcp_vty.c b/openbsc/src/libmgcp/mgcp_vty.c
index abb54d4..d40a3ce 100644
--- a/openbsc/src/libmgcp/mgcp_vty.c
+++ b/openbsc/src/libmgcp/mgcp_vty.c
@@ -1294,6 +1294,7 @@
 	int rc;
 	struct mgcp_trunk_config *trunk;
 
+	cfg->osmux_port = OSMUX_PORT;
 	/* Default to 4 messages */
 	cfg->osmux_batch = 4;