Warning about PDF resource

[cprmlao@hotmail.com]

Hi,
When I use the next code with ModalWindow to download a pdf I am getting the next message in chrome console.
The PDF is downloaded but I get the warning.
Is there a way to avoid it?

Code:

IWBase__ED463BD0B.js:4 Resource interpreted as Document but transferred with MIME type application/pdf

Code:

with IWModalWindow1 do begin
    Reset;
    Autosize := False;
    Title := 'Bulário';
    Draggable := False;
    WindowWidth := 95;
    WindowHeight := 95;
    Src := 'http://mysite/document.pdf';
    OnAsyncClick := nil;
    Show;
  end;

Regards, Luiz