diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index d1789aa..df24d2f 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -2921,7 +2921,7 @@
 	int i, rc = 0;
 	struct gsm_trans *trans = NULL, *transt;
 	struct gsm_subscriber_connection *conn = NULL;
-	struct gsm_bts *bts;
+	struct gsm_bts *bts = NULL;
 	struct gsm_mncc *data = arg, rel;
 
 	DEBUGP(DMNCC, "receive message %s\n", get_mncc_name(msg_type));