diff --git a/src/libcommon/gsm_data.c b/src/libcommon/gsm_data.c
index b5bf059..7be2240 100644
--- a/src/libcommon/gsm_data.c
+++ b/src/libcommon/gsm_data.c
@@ -254,12 +254,13 @@
 	if (!model && type != GSM_BTS_TYPE_UNKNOWN)
 		return NULL;
 
-	bts = gsm_bts_alloc(net);
+	bts = gsm_bts_alloc(net, net->num_bts);
 	if (!bts)
 		return NULL;
 
+	net->num_bts++;
+
 	bts->network = net;
-	bts->nr = net->num_bts++;
 	bts->type = type;
 	bts->model = model;
 	bts->bsic = bsic;
diff --git a/src/libcommon/gsm_data_shared.c b/src/libcommon/gsm_data_shared.c
index 8992636..d792f3b 100644
--- a/src/libcommon/gsm_data_shared.c
+++ b/src/libcommon/gsm_data_shared.c
@@ -312,7 +312,7 @@
 	.initial_mcs = 6,
 };
 
-struct gsm_bts *gsm_bts_alloc(void *ctx)
+struct gsm_bts *gsm_bts_alloc(void *ctx, uint8_t bts_num)
 {
 	struct gsm_bts *bts = talloc_zero(ctx, struct gsm_bts);
 	int i;
@@ -320,6 +320,7 @@
 	if (!bts)
 		return NULL;
 
+	bts->nr = bts_num;
 	bts->num_trx = 0;
 	INIT_LLIST_HEAD(&bts->trx_list);
 	bts->ms_max_power = 15;	/* dBm */