diff --git a/openbsc/src/libmsc/smpp_smsc.h b/openbsc/src/libmsc/smpp_smsc.h
index e93ae30..b1617e6 100644
--- a/openbsc/src/libmsc/smpp_smsc.h
+++ b/openbsc/src/libmsc/smpp_smsc.h
@@ -23,6 +23,8 @@
 
 	int use;
 
+	uint32_t own_seq_nr;
+
 	struct osmo_wqueue wqueue;
 	struct sockaddr_storage sa;
 	socklen_t sa_len;
@@ -54,6 +56,9 @@
 int smpp_tx_submit_r(struct osmo_esme *esme, uint32_t sequence_nr,
 		     uint32_t command_status, char *msg_id);
 
+int smpp_tx_alert(struct osmo_esme *esme, uint8_t ton, uint8_t npi,
+		  const char *addr, uint8_t avail_status);
+
 int handle_smpp_submit(struct osmo_esme *esme, struct submit_sm_t *submit,
 			struct submit_sm_resp_t *submit_r);