diff --git a/ttcn/AtsImsIot/AtsImsIot_TestSystem.ttcn b/ttcn/AtsImsIot/AtsImsIot_TestSystem.ttcn
index 011bf0a9ef61cadf4c2604711af7d8b65532f126..41150fed1caf297158c11bd327378e649539dcbf 100644
--- a/ttcn/AtsImsIot/AtsImsIot_TestSystem.ttcn
+++ b/ttcn/AtsImsIot/AtsImsIot_TestSystem.ttcn
@@ -124,6 +124,7 @@ module AtsImsIot_TestSystem {
 			SipInterfaceMonitor gmB 	optional,
 			SipInterfaceMonitor mmB_PSAP  optional,// MmMx interface at IBCF to PSAP
 			SipInterfaceMonitor mwEB      optional,// Mw interface at E-CSCF/IBCF 
+			SipInterfaceMonitor mlE_LRF   optional,// Ml interface at E-CSCF/LRF
 			SipInterfaceMonitor mwS_PSAP  optional,// MwMmMx interface at E,SCSCF to PSAP
 			SipInterfaceMonitor ic      optional,
 			SipInterfaceMonitor mwPI    optional,// Mw interface at P-CSCF/I-CSCF or P-CSCF/S-CSCF if I-CSCF not used