diff --git a/htdocs/societe/index.php b/htdocs/societe/index.php
index f5a4392a0c0..14901dc8a9c 100644
--- a/htdocs/societe/index.php
+++ b/htdocs/societe/index.php
@@ -185,6 +185,7 @@ $thirdpartygraph .= '</td></tr>';
 $thirdpartygraph .= '</table>';
 $thirdpartygraph .= '</div>';
 
+$thirdpartycateggraph = '';
 if (!empty($conf->categorie->enabled) && !empty($conf->global->CATEGORY_GRAPHSTATS_ON_THIRDPARTIES)) {
 	require_once DOL_DOCUMENT_ROOT.'/categories/class/categorie.class.php';
 	$elementtype = 'societe';