diff --git a/openbsc/src/libbsc/abis_nm.c b/openbsc/src/libbsc/abis_nm.c
index 4fd11c7..e95c0a9 100644
--- a/openbsc/src/libbsc/abis_nm.c
+++ b/openbsc/src/libbsc/abis_nm.c
@@ -548,6 +548,7 @@
 
 		nack_data.msg = mb;
 		nack_data.mt = mt;
+		nack_data.bts = sign_link->trx->bts;
 		osmo_signal_dispatch(SS_NM, S_NM_NACK, &nack_data);
 		abis_nm_queue_send_next(sign_link->trx->bts);
 		return 0;