diff --git a/openbsc/include/openbsc/sms_queue.h b/openbsc/include/openbsc/sms_queue.h
index d377aca..d048566 100644
--- a/openbsc/include/openbsc/sms_queue.h
+++ b/openbsc/include/openbsc/sms_queue.h
@@ -2,7 +2,9 @@
 #define SMS_QUEUE_H
 
 struct gsm_network;
+struct gsm_sms_queue;
 
 int sms_queue_start(struct gsm_network *, int in_flight);
+int sms_queue_trigger(struct gsm_sms_queue *);
 
 #endif