diff --git a/openbsc/tests/channel/channel_test.c b/openbsc/tests/channel/channel_test.c
index 61c0f95..0c27112 100644
--- a/openbsc/tests/channel/channel_test.c
+++ b/openbsc/tests/channel/channel_test.c
@@ -77,6 +77,8 @@
 void input_event() {}
 void sms_alloc() {}
 void gsm_net_update_ctype(struct gsm_network *network) {}
+void gsm48_secure_channel() {}
+
 
 struct tlv_definition nm_att_tlvdef;