diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index 9943bc3..191ef2c 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -8047,11 +8047,11 @@ namespace ZNsMain
         void pop_back (){DeleteTail();}
 
 
-        TypeData& front(){return GetHeadData();}
-        TypeData& back (){return GetTailData();}
+        TypeData & front()      {return GetHeadData();}
+        TypeData & back ()      {return GetTailData();}
 
-        const TypeData& front() const{return GetHeadData();}
-        const TypeData& back () const{return GetTailData();}
+        TypeDataC& front() const{return GetHeadData();}
+        TypeDataC& back () const{return GetTailData();}
 
 
         template<typename TFunctor> void IterElement(TFunctor AO_Functor)