diff --git a/main.pas b/main.pas
index 34ab0e8..06d0e19 100644
--- a/main.pas
+++ b/main.pas
@@ -4912,7 +4912,7 @@ var
   begin
   s:=ansistring(HSlib.encodeURL(data.lastFN));
   conn.addHeader( ansistring('Content-Disposition: '+if_(attach, 'attachment; ')
-    +'filename*=UTF-8'''''+s+'; filename='+s));
+    +'filename*=UTF-8''''"'+s+'"; filename="'+s+'"'));
   end;
 
   function sessionRedirect():boolean;