diff --git a/tests/gsm0408/gsm0408_test.c b/tests/gsm0408/gsm0408_test.c
index af62537..0fe1310 100644
--- a/tests/gsm0408/gsm0408_test.c
+++ b/tests/gsm0408/gsm0408_test.c
@@ -80,3 +80,4 @@
 void rsl_chan_release(void) {}
 void msgb_alloc(void) {}
 void gsm0411_send_sms(void) {}
+void lchan_auto_release(void) {}