diff --git a/openbsc/src/libbsc/abis_rsl.c b/openbsc/src/libbsc/abis_rsl.c
index dc4ede2..316fc3f 100644
--- a/openbsc/src/libbsc/abis_rsl.c
+++ b/openbsc/src/libbsc/abis_rsl.c
@@ -1456,6 +1456,8 @@
 
 	msg->lchan = lchan_lookup(sign_link->trx, rslh->chan_nr,
 				  "Abis RSL rx DCHAN: ");
+	if (!msg->lchan)
+		return -1;
 	ts_name = gsm_lchan_name(msg->lchan);
 
 	switch (rslh->c.msg_type) {