diff --git a/library/TRXC_Types.ttcn b/library/TRXC_Types.ttcn
index 1a37a8c..77666d9 100644
--- a/library/TRXC_Types.ttcn
+++ b/library/TRXC_Types.ttcn
@@ -58,10 +58,10 @@
 external function dec_TrxcMessage(in charstring id) return TrxcMessage
 	with { extension "prototype(convert) decode(TEXT)" };
 
-template (value) TrxcMessage ts_TRXC_FAKE_RSSI(uint8_t rssi) := {
+template (value) TrxcMessage ts_TRXC_FAKE_RSSI(uint8_t rssi, int16_t thresh := 0) := {
 	cmd := {
 		verb := "FAKE_RSSI",
-		params := { int2str(rssi) }
+		params := { int2str(rssi), int2str(thresh) }
 	}
 }