diff --git a/htdocs/adherents/list.php b/htdocs/adherents/list.php
index d669270b565..1c93b247dfc 100644
--- a/htdocs/adherents/list.php
+++ b/htdocs/adherents/list.php
@@ -65,6 +65,7 @@ $search_filter = GETPOST("search_filter", 'alpha');
 $search_status = GETPOST("search_status", 'intcomma');
 $catid        = GETPOST("catid", 'int');
 $optioncss = GETPOST('optioncss', 'alpha');
+$socid = GETPOST('socid', 'int');
 
 $filter = GETPOST("filter", 'alpha');
 if ($filter) {