diff --git a/bsc-nat/BSCNAT_Tests.ttcn b/bsc-nat/BSCNAT_Tests.ttcn
index 47d894b..81afcfa 100644
--- a/bsc-nat/BSCNAT_Tests.ttcn
+++ b/bsc-nat/BSCNAT_Tests.ttcn
@@ -138,7 +138,7 @@
 	f_vty_transceive(BSCNATVTY, "enable");
 }
 
-function f_init(void_fn_bsc_ms fn_bsc_ms, BssmapCreateCallback cb_msc, boolean use_osmux) runs on test_CT {
+function f_init(void_fn_bsc_ms fn_bsc_ms, void_fn_bsc fn_bsc, BssmapCreateCallback cb_msc, boolean use_osmux) runs on test_CT {
 	var integer i;
 	var charstring id;
 
@@ -166,7 +166,7 @@
 		pars.sccp_addr_remote := bsc[i].sccp_addr_peer;
 		pars.use_osmux := use_osmux;
 		bsc[i].BSC.start(BSC_MS_Simulation.main(mp_nat_ip, mp_nat_port, mp_bsc_ip, mp_bsc_port+i,
-							bsc[i].sccp_pars, pars, fn_bsc_ms, id));
+							bsc[i].sccp_pars, pars, fn_bsc_ms, fn_bsc, id));
 	}
 
 }
@@ -191,6 +191,7 @@
 	timer T := 30.0;
 
 	f_init(refers(bsc_ms_establish_fully),
+	       refers(bsc_do_nothing),
 	       refers(CreateCallback_establish_fully),
 	       use_osmux);