diff --git a/include/osmocom/mgcp/mgcp.h b/include/osmocom/mgcp/mgcp.h
index a4d4e6f..4c541cb 100644
--- a/include/osmocom/mgcp/mgcp.h
+++ b/include/osmocom/mgcp/mgcp.h
@@ -208,4 +208,4 @@
 
 int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, int port, uint8_t dscp,
 		     uint8_t prio);
-int mgcp_udp_send(int fd, struct osmo_sockaddr *addr, int port, const char *buf, int len);
+int mgcp_udp_send(int fd, const struct osmo_sockaddr *addr, const char *buf, int len);