diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index d59d16513..5497c2da4 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -210,7 +210,7 @@ function f_init_smpp(charstring id) runs on MTC_CT {
 
 	vc_SMPP := SMPP_Emulation_CT.create(id);
 	map(vc_SMPP:SMPP_PORT, system:SMPP_PORT);
-	vc_SMPP.start(SMPP_Emulation.main_client(pars, mp_msc_ip, mp_msc_smpp_port, "", -1));
+	vc_SMPP.start(SMPP_Emulation.main_client(pars, mp_msc_ip, mp_msc_smpp_port, "", 0));
 }