diff --git a/openbsc/src/libcommon/gsm_data_shared.c b/openbsc/src/libcommon/gsm_data_shared.c
index 8d5d0f8..8687a10 100644
--- a/openbsc/src/libcommon/gsm_data_shared.c
+++ b/openbsc/src/libcommon/gsm_data_shared.c
@@ -276,6 +276,9 @@
 	bts->rach_ldavg_slots = -1;
 	bts->paging.free_chans_need = -1;
 
+	/* si handling */
+	bts->bcch_change_mark = 1;
+
 	return bts;
 }