diff --git a/openbsc/src/chan_alloc.c b/openbsc/src/chan_alloc.c
index a66f70e..860355a 100644
--- a/openbsc/src/chan_alloc.c
+++ b/openbsc/src/chan_alloc.c
@@ -269,3 +269,18 @@
 
 	return NULL;
 }
+
+struct gsm_lchan *lchan_for_subscr(struct gsm_subscriber *subscr)
+{
+	struct gsm_bts *bts;
+	struct gsm_network *net = subscr->net;
+	struct gsm_lchan *lchan;
+
+	llist_for_each_entry(bts, &net->bts_list, list) {
+		lchan = lchan_find(bts, subscr);
+		if (lchan)
+			return lchan;
+	}
+
+	return 0;
+}