diff --git a/htdocs/accountancy/bookkeeping/card.php b/htdocs/accountancy/bookkeeping/card.php
index 66838b8c2e2..e2f1e86008d 100644
--- a/htdocs/accountancy/bookkeeping/card.php
+++ b/htdocs/accountancy/bookkeeping/card.php
@@ -447,7 +447,7 @@ if ($action == 'create') {
 		print $langs->trans('Docdate');
 		print '</td>';
 		if ($action != 'editdate') {
-			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editdate&token='.newToken().'&piece_num='.urlencode($object->piece_num).'&mode='.urlencode($mode).'">'.img_edit($langs->transnoentitiesnoconv('SetDate'), 1).'</a></td>';
+			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editdate&token='.newToken().'&piece_num='.urlencode((string) ($object->piece_num)).'&mode='.urlencode((string) ($mode)).'">'.img_edit($langs->transnoentitiesnoconv('SetDate'), 1).'</a></td>';
 		}
 		print '</tr></table>';
 		print '</td><td colspan="3">';
@@ -474,7 +474,7 @@ if ($action == 'create') {
 		print $langs->trans('Codejournal');
 		print '</td>';
 		if ($action != 'editjournal') {
-			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editjournal&token='.newToken().'&piece_num='.urlencode($object->piece_num).'&mode='.urlencode($mode).'">'.img_edit($langs->transnoentitiesnoconv('Edit'), 1).'</a></td>';
+			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editjournal&token='.newToken().'&piece_num='.urlencode((string) ($object->piece_num)).'&mode='.urlencode((string) ($mode)).'">'.img_edit($langs->transnoentitiesnoconv('Edit'), 1).'</a></td>';
 		}
 		print '</tr></table>';
 		print '</td><td>';
@@ -501,7 +501,7 @@ if ($action == 'create') {
 		print $langs->trans('Piece');
 		print '</td>';
 		if ($action != 'editdocref') {
-			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editdocref&token='.newToken().'&piece_num='.urlencode($object->piece_num).'&mode='.urlencode($mode).'">'.img_edit($langs->transnoentitiesnoconv('Edit'), 1).'</a></td>';
+			print '<td class="right"><a class="editfielda reposition" href="'.$_SERVER["PHP_SELF"].'?action=editdocref&token='.newToken().'&piece_num='.urlencode((string) ($object->piece_num)).'&mode='.urlencode((string) ($mode)).'">'.img_edit($langs->transnoentitiesnoconv('Edit'), 1).'</a></td>';
 		}
 		print '</tr></table>';
 		print '</td><td>';