diff --git a/include/osmocom/msc/sgs_iface.h b/include/osmocom/msc/sgs_iface.h
index 575468e..a319663 100644
--- a/include/osmocom/msc/sgs_iface.h
+++ b/include/osmocom/msc/sgs_iface.h
@@ -89,4 +89,5 @@
 int sgs_iface_tx_paging(struct vlr_subscr *vsub, enum sgsap_service_ind serv_ind);
 int sgs_iface_tx_dtap_ud(struct msc_a *msc_a, struct msgb *msg);
 void sgs_iface_tx_release(struct vlr_subscr *vsub);
+void sgs_iface_tx_serv_abrt(struct vlr_subscr *vsub);