diff --git a/htdocs/societe/card.php b/htdocs/societe/card.php
index bb9d2376a47..8b5dcd251d2 100644
--- a/htdocs/societe/card.php
+++ b/htdocs/societe/card.php
@@ -95,6 +95,7 @@ $backtopageforcancel = GETPOST('backtopageforcancel', 'alpha');
 $backtopagejsfields = GETPOST('backtopagejsfields', 'alpha');
 $confirm 	= GETPOST('confirm', 'alpha');
 
+$dol_openinpopup = '';
 if (!empty($backtopagejsfields)) {
 	$tmpbacktopagejsfields = explode(':', $backtopagejsfields);
 	$dol_openinpopup = $tmpbacktopagejsfields[0];