diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index a3fe0be..c7b4369 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -7061,13 +7061,13 @@ namespace ZNsMain
         }/*
         ZtCChars()*/
 
-        ZtCChars(TypeCharC* APC_TypeChar)
+        explicit ZtCChars(TypeCharC* APC_TypeChar)
         {
             mp_TypeChar   =
                 const_cast<TypeChar*>(APC_TypeChar);
             ml_TypeSize = ZftGetLength(mp_TypeChar);
         }/*
-        ZtCChars(TypeCharC* APC_TypeChar)*/
+        explicit ZtCChars(TypeCharC* APC_TypeChar)*/
 
         ZtCChars(TypeCharC* APC_TypeChar, TypeSize AL_Length)
         {