diff --git a/htdocs/core/boxes/box_graph_orders_permonth.php b/htdocs/core/boxes/box_graph_orders_permonth.php
index 6e5bf253832..a67c3b94f92 100644
--- a/htdocs/core/boxes/box_graph_orders_permonth.php
+++ b/htdocs/core/boxes/box_graph_orders_permonth.php
@@ -135,7 +135,8 @@ class box_graph_orders_permonth extends ModeleBoxes
 				$data1 = $stats->getNbByMonthWithPrevYear($endyear, $startyear, (GETPOST('action', 'aZ09')==$refreshaction?-1:(3600*24)), ($WIDTH<300?2:0), $startmonth);
 
 				$filenamenb = $dir."/".$prefix."ordersnbinyear-".$endyear.".png";
-				if ($mode == 'customer') $fileurlnb = DOL_URL_ROOT.'/viewimage.php?modulepart=orderstats&amp;file=ordersnbinyear-'.$endyear.'.png';
+                // default value for customer mode
+				$fileurlnb = DOL_URL_ROOT.'/viewimage.php?modulepart=orderstats&amp;file=ordersnbinyear-'.$endyear.'.png';
 				if ($mode == 'supplier') $fileurlnb = DOL_URL_ROOT.'/viewimage.php?modulepart=orderstatssupplier&amp;file=ordersnbinyear-'.$endyear.'.png';
 
 				$px1 = new DolGraph();
@@ -144,7 +145,8 @@ class box_graph_orders_permonth extends ModeleBoxes
 				{
 					$px1->SetData($data1);
 					unset($data1);
-					$i=$startyear;$legend=array();
+					$i=$startyear;
+                    $legend=array();
 					while ($i <= $endyear)
 					{
 						if ($startmonth != 1)