diff --git a/Include/Zmq/Common.mqh b/Include/Zmq/Common.mqh
index 7b99724..7a46dd3 100644
--- a/Include/Zmq/Common.mqh
+++ b/Include/Zmq/Common.mqh
@@ -104,6 +104,7 @@ string StringFromUtf8(const uchar &utf8[])
 //+------------------------------------------------------------------+
 void StringToUtf8(const string str,uchar &utf8[],bool ending=true)
   {
+   if(!ending && str=="") return;
    int count=ending ? -1 : StringLen(str);
    StringToCharArray(str,utf8,0,count,CP_UTF8);
   }