make handover reference a function call argument
diff --git a/openbsc/include/openbsc/gsm_04_08.h b/openbsc/include/openbsc/gsm_04_08.h
index 01afe05..b867155 100644
--- a/openbsc/include/openbsc/gsm_04_08.h
+++ b/openbsc/include/openbsc/gsm_04_08.h
@@ -769,8 +769,8 @@
 int gsm48_send_rr_app_info(struct gsm_lchan *lchan, u_int8_t apdu_id,
 			   u_int8_t apdu_len, const u_int8_t *apdu);
 int gsm48_send_rr_ass_cmd(struct gsm_lchan *lchan, u_int8_t power_class);
-int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan,
-		      struct gsm_lchan *new_lchan, u_int8_t power_command);
+int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan,
+		      u_int8_t power_command, u_int8_t ho_ref);
 
 int bsc_upqueue(struct gsm_network *net);