diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c
index f135013..52d2b42 100644
--- a/src/gsm_04_08.c
+++ b/src/gsm_04_08.c
@@ -300,6 +300,7 @@
 	if (!subscr) {
 		/* 0x16 is congestion */
 		gsm0408_loc_upd_rej(msg->lchan, 0x16);
+		rsl_chan_release(msg->lchan);
 		return -EINVAL;
 	}