diff --git a/engine/chargers_test.go b/engine/chargers_test.go
index 68bc89a28..c071bd9b5 100755
--- a/engine/chargers_test.go
+++ b/engine/chargers_test.go
@@ -33,7 +33,7 @@ var (
 		&ChargerProfile{
 			Tenant:    "cgrates.org",
 			ID:        "CPP_1",
-			FilterIDs: []string{"FLTR_CP_1", "FLTR_CP_4"},
+			FilterIDs: []string{"FLTR_CP_1", "FLTR_CP_4", "*string:~*opts.*subsys:*chargers"},
 			ActivationInterval: &utils.ActivationInterval{
 				ActivationTime: time.Date(2014, 7, 14, 14, 25, 0, 0, time.UTC),
 			},
@@ -66,6 +66,9 @@ var (
 	}
 	chargerEvents = []*utils.CGREventWithOpts{
 		{
+			Opts: map[string]interface{}{
+				utils.Subsys: utils.MetaChargers,
+			},
 			CGREvent: &utils.CGREvent{
 				Tenant: config.CgrConfig().GeneralCfg().DefaultTenant,
 				ID:     utils.GenUUID(),
diff --git a/engine/filters.go b/engine/filters.go
index 6447ce56e..b6b602a9a 100644
--- a/engine/filters.go
+++ b/engine/filters.go
@@ -603,7 +603,7 @@ func (dDP *dynamicDP) RemoteHost() net.Addr {
 
 var initialDPPrefixes = utils.NewStringSet([]string{utils.MetaReq, utils.MetaVars,
 	utils.MetaCgreq, utils.MetaCgrep, utils.MetaRep, utils.MetaCGRAReq,
-	utils.MetaAct, utils.MetaEC, utils.MetaUCH})
+	utils.MetaAct, utils.MetaEC, utils.MetaUCH, utils.MetaOpts})
 
 func (dDP *dynamicDP) FieldAsInterface(fldPath []string) (val interface{}, err error) {
 	if len(fldPath) == 0 {