diff --git a/openbsc/src/nat/bsc_nat.c b/openbsc/src/nat/bsc_nat.c
index 65f6eec..0fa5713 100644
--- a/openbsc/src/nat/bsc_nat.c
+++ b/openbsc/src/nat/bsc_nat.c
@@ -644,7 +644,7 @@
 		case SCCP_MSG_TYPE_CR:
 			if (bsc_nat_filter_sccp_cr(bsc, msg, parsed, &con_type) != 0)
 				goto exit3;
-			if (create_sccp_src_ref(bsc, msg, parsed) != 0)
+			if (create_sccp_src_ref(bsc, parsed) != 0)
 				goto exit2;
 			con = patch_sccp_src_ref_to_msc(msg, parsed, bsc);
 			con->con_type = con_type;
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;