diff --git a/library/DIAMETER_Emulation.ttcn b/library/DIAMETER_Emulation.ttcn
index 8fb7230..748b452 100644
--- a/library/DIAMETER_Emulation.ttcn
+++ b/library/DIAMETER_Emulation.ttcn
@@ -240,7 +240,7 @@
 			return omit;
 		}
 		var AVP_Grouped grp := valueof(sid_avp.avp_data.avp_DCC_NONE_Subscription_Id);
-		if (not match(grp[0], tr_SubcrIdType(END_USER_IMSI))) {
+		if (not match(grp[0], tr_AVP_SubcrIdType(END_USER_IMSI))) {
 			return omit;
 		}
 		return str2hex(oct2char(grp[1].avp.avp_data.avp_DCC_NONE_Subscription_Id_Data));