diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 06071f1e9e36721dab9b0fd4027f9ad48bb9cc85..c9d78abe710eda27ea0e913c358dbf71b1f748d8 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -354,8 +354,8 @@ function top_htmlhead($head, $title="", $target="")
//header("Content-type: text/html; charset=UTF-8");
header("Content-type: text/html; charset=iso-8859-1");
-// print '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';
- print '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">';
+ print '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';
+// print '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd>';
print "\n<html>";
print $langs->lang_header();