diff --git a/type.go b/type.go
index 90dc3482..be5aa2a1 100644
--- a/type.go
+++ b/type.go
@@ -207,6 +207,7 @@ var (
 	StringType = reflect.TypeOf(c_EMPTY_STRING)
 	BoolType   = reflect.TypeOf(c_BOOL_DEFAULT)
 	ByteType   = reflect.TypeOf(c_BYTE_DEFAULT)
+	BytesType  = reflect.SliceOf(ByteType)
 
 	TimeType = reflect.TypeOf(c_TIME_DEFAULT)
 )