diff --git a/openbsc/src/nat/bsc_sccp.c b/openbsc/src/nat/bsc_sccp.c
index 59e19bc..f77cbef 100644
--- a/openbsc/src/nat/bsc_sccp.c
+++ b/openbsc/src/nat/bsc_sccp.c
@@ -98,6 +98,7 @@
 		if (assign_src_local_reference(&conn->patched_ref, bsc->nat) != 0) {
 			LOGP(DNAT, LOGL_ERROR, "BSC %d reused src ref: %d and we failed to generate a new id.\n",
 			     bsc->cfg->nr, sccp_src_ref_to_int(parsed->src_local_ref));
+			bsc_mgcp_dlcx(conn);
 			llist_del(&conn->list_entry);
 			talloc_free(conn);
 			return -1;