diff --git a/usr/local/www/diag_backup.php b/usr/local/www/diag_backup.php
index 8e3f601261..b5ec90c01a 100755
--- a/usr/local/www/diag_backup.php
+++ b/usr/local/www/diag_backup.php
@@ -709,7 +709,7 @@ function backuparea_change(obj) {
 						<?=gettext("Open a"); ?> <?=$g['[product_name']?> <?=gettext("configuration XML file and click the button below to restore the configuration."); ?>
 						<br /><br />
 						<?=gettext("Restore area:"); ?> <?php spit_out_select_items("restorearea", true); ?>
-						<p><input name="conffile" type="file" class="formfld unknown" id="conffile" size="40"></p>
+						<p><input name="conffile" type="file" class="formbtn" id="conffile" size="40"></p>
 						<table>
 							<tr>
 								<td>