diff --git a/include/openbsc/gsm_data.h b/include/openbsc/gsm_data.h
index 494b0d1..65646f5 100644
--- a/include/openbsc/gsm_data.h
+++ b/include/openbsc/gsm_data.h
@@ -160,6 +160,11 @@
 	struct gsm_bts_trx_ts ts[TRX_NR_TS];
 };
 
+enum gsm_bts_type {
+	GSM_BTS_TYPE_UNKNOWN,
+	GSM_BTS_TYPE_BS11,
+};
+
 /* One BTS */
 struct gsm_bts {
 	struct gsm_network *network;
@@ -167,9 +172,12 @@
 	u_int8_t nr;
 	/* location area code of this BTS */
 	u_int8_t location_area_code;
+	/* type of BTS */
+	enum gsm_bts_type type;
 
 	/* Abis network management O&M handle */
 	struct abis_nm_h *nmh;
+
 	/* number of this BTS on given E1 link */
 	u_int8_t bts_nr;
 
diff --git a/src/gsm_data.c b/src/gsm_data.c
index def7fff..834f213 100644
--- a/src/gsm_data.c
+++ b/src/gsm_data.c
@@ -98,6 +98,7 @@
 		
 		bts->network = net;
 		bts->nr = i;
+		bts->type = GSM_BTS_TYPE_BS11;
 
 		for (j = 0; j < BTS_MAX_TRX; j++) {
 			struct gsm_bts_trx *trx = &bts->trx[j];