diff --git a/src/telnet_interface.c b/src/telnet_interface.c
index 87bf60f..3d3ed76 100644
--- a/src/telnet_interface.c
+++ b/src/telnet_interface.c
@@ -229,7 +229,7 @@
 		return;
 
 	/* TODO: add the origin */
-	gsm48_cc_tx_setup(lchan, NULL, NULL);
+	gsm48_cc_tx_setup(lchan, NULL);
 }
 
 void telnet_send_gsm_48(struct telnet_connection *connection) {