diff --git a/htdocs/comm/mailing/card.php b/htdocs/comm/mailing/card.php
index 915a7a7ce9b..e5c125d14cd 100644
--- a/htdocs/comm/mailing/card.php
+++ b/htdocs/comm/mailing/card.php
@@ -1275,7 +1275,7 @@ if ($action == 'create') {
 			}
 			$out .= '<input type="file" class="flat" id="addedfile" name="addedfile" value="'.$langs->trans("Upload").'" />';
 			$out .= ' ';
-			$out .= '<input type="submit" class="button" id="'.$addfileaction.'" name="'.$addfileaction.'" value="'.$langs->trans("MailingAddFile").'" />';
+			$out .= '<input type="submit" class="button smallpaddingimp" id="'.$addfileaction.'" name="'.$addfileaction.'" value="'.$langs->trans("MailingAddFile").'" />';
 			print $out;
 			print '</td></tr>';