diff --git a/htdocs/admin/mails_templates.php b/htdocs/admin/mails_templates.php
index af7d29c0fd6..c63ff44c32b 100644
--- a/htdocs/admin/mails_templates.php
+++ b/htdocs/admin/mails_templates.php
@@ -556,7 +556,7 @@ foreach ($fieldsforcontent as $tmpfieldlist)
 		print '<input type="text" class="flat minwidth500" name="'.$tmpfieldlist.'" value="' . (! empty($obj->{$tmpfieldlist}) ? $obj->{$tmpfieldlist} : '') . '">';
 	}
 	else if ($tmpfieldlist == 'joinfiles') {
-		print '<input type="text" class="flat maxwidth50" name="'.$tmpfieldlist.'" value="' . (! empty($obj->{$tmpfieldlist}) ? $obj->{$tmpfieldlist} : '') . '">';
+		print '<input type="text" class="flat maxwidth50" name="'.$tmpfieldlist.'" value="' . (isset($obj->{$tmpfieldlist}) ? $obj->{$tmpfieldlist} : '1') . '">';
 	}
 	else
 	{