--- a/help/default/html/export.html
+++ b/help/default/html/export.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
   <head>
     <meta http-equiv="content-type" content="text/html; charset=UTF-8">