diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index 80d69d1..bcd6f8e 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -281,7 +281,7 @@
 /**
  * SCCP patching and handling
  */
-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);
 int update_sccp_src_ref(struct sccp_connections *sccp, struct bsc_nat_parsed *parsed);
 void remove_sccp_src_ref(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed);
 struct sccp_connections *patch_sccp_src_ref_to_bsc(struct msgb *, struct bsc_nat_parsed *, struct bsc_nat *);
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;
 
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index adc8a19..ca9fbd4 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -294,7 +294,7 @@
 		fprintf(stderr, "Con should not exist %p\n", con_found);
 		abort();
 	}
-	rc = create_sccp_src_ref(con, msg, parsed);
+	rc = create_sccp_src_ref(con, parsed);
 	if (rc != 0) {
 		fprintf(stderr, "Failed to create a ref\n");
 		abort();