diff --git a/pkg/acl/eacl/enums.go b/pkg/acl/eacl/enums.go
index 38ab97d..f626202 100644
--- a/pkg/acl/eacl/enums.go
+++ b/pkg/acl/eacl/enums.go
@@ -60,23 +60,29 @@ const (
 )
 
 const (
+	// ReservedHeaderNamePrefix used in filter names to specify well known
+	// headers such as container id, object id, owner id, etc.
+	// All names without this prefix used to lookup through user defined headers
+	// in object or x-headers in request.
+	ReservedHeaderNamePrefix = "_"
+
 	// HdrObjSysNameID is a name of ID field in system header of object.
-	HdrObjSysNameID = "_ID"
+	HdrObjSysNameID = ReservedHeaderNamePrefix + "ID"
 
 	// HdrObjSysNameCID is a name of cid field in system header of object.
-	HdrObjSysNameCID = "_CID"
+	HdrObjSysNameCID = ReservedHeaderNamePrefix + "CID"
 
 	// HdrObjSysNameOwnerID is a name of OwnerID field in system header of object.
-	HdrObjSysNameOwnerID = "_OWNER_ID"
+	HdrObjSysNameOwnerID = ReservedHeaderNamePrefix + "OWNER_ID"
 
 	// HdrObjSysNameVersion is a name of version field in system header of object.
-	HdrObjSysNameVersion = "_VERSION"
+	HdrObjSysNameVersion = ReservedHeaderNamePrefix + "VERSION"
 
 	// HdrObjSysNamePayloadLength is a name of PayloadLength field in system header of object.
-	HdrObjSysNamePayloadLength = "_PAYLOAD_LENGTH"
+	HdrObjSysNamePayloadLength = ReservedHeaderNamePrefix + "PAYLOAD_LENGTH"
 
 	// HdrObjSysNameCreatedEpoch is a name of CreatedAt.Epoch field in system header of object.
-	HdrObjSysNameCreatedEpoch = "_CREATED_EPOCH"
+	HdrObjSysNameCreatedEpoch = ReservedHeaderNamePrefix + "CREATED_EPOCH"
 )
 
 func (a Action) ToV2() v2acl.Action {