diff --git a/openbsc/src/nat/bsc_sccp.c b/openbsc/src/nat/bsc_sccp.c
index f77cbef..47cd9ce 100644
--- a/openbsc/src/nat/bsc_sccp.c
+++ b/openbsc/src/nat/bsc_sccp.c
@@ -82,7 +82,7 @@
 	return -1;
 }
 
-int create_sccp_src_ref(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed)
+int create_sccp_src_ref(struct bsc_connection *bsc, struct bsc_nat_parsed *parsed)
 {
 	struct sccp_connections *conn;