diff --git a/htdocs/categories/viewcat.php b/htdocs/categories/viewcat.php
index 895147175de..95760ee87aa 100644
--- a/htdocs/categories/viewcat.php
+++ b/htdocs/categories/viewcat.php
@@ -197,8 +197,8 @@ $head = categories_prepare_head($object,$type);
 
 
 dol_fiche_head($head, 'card', $title, -1, 'category');
-$linkback=(GETPOST('backtolist') ? GETPOST('backtolist') : DOL_URL_ROOT.'/categories/index.php?leftmenu=cat&type='.$type);
-$linkback = '<a href="'.$linkback.'\">'.$langs->trans("BackToList").'</a>';
+$backtolist = (GETPOST('backtolist') ? GETPOST('backtolist') : DOL_URL_ROOT.'/categories/index.php?leftmenu=cat&type='.$type);
+$linkback = '<a href="'.$backtolist.'\">'.$langs->trans("BackToList").'</a>';
 $object->next_prev_filter=" type = ".$object->type;
 $object->ref = $object->label;
 $morehtmlref='<br><div class="refidno"><a href="'.DOL_URL_ROOT.'/categories/index.php?leftmenu=cat&type='.$type.'">'.$langs->trans("Root").'</a> >> ';