Delphi XE8 compilation problem

In one application, I use thirdparty units to handle smart cards
In one unit, EIDNative, there is this function (that compiles well with Delphi XE2) :

function FormatEIDDate(D : AnsiString) : AnsiString;
  if Length(D) <> 8 then
   Result := ''
       Result := Copy(D, 7, 2) + DateSeparator + Copy(D, 5, 2)+ DateSeparator +
         Copy(D, 1, 4);
But now with Delphi XE8, it says undeclared identifier : "DateSeparator"
I checked that SysUtils is in the unit uses clause and that the (new) SysUtils contains DateSeparator definition...
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Geert GOracle dbaCommented:
you'll have to use FormatSettings.DateSeparator

it's for all the formatsettings that this replacement has to happen

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