diff --git a/ZCppMain/ZtCStringEx.H b/ZCppMain/ZtCStringEx.H
index c9ecd23..1efef83 100644
--- a/ZCppMain/ZtCStringEx.H
+++ b/ZCppMain/ZtCStringEx.H
@@ -413,7 +413,6 @@ namespace ZNsMain
         typedef typename ZCTypeString::TypeLong         TypeLength       ;
     public:
         typedef typename ZCTypeChars ::TypeChar   TypeChar  ; // TTypCh 과 같은 형이어야 한다.
-        typedef typename ZCTypeChars ::TypeLength TypeLength;
         typedef typename ZCTypeChars ::ZCChars    ZCChars   ;
     public:
         typedef TypeChar      TypeData  ;