diff --git a/htdocs/core/boxes/box_graph_product_distribution.php b/htdocs/core/boxes/box_graph_product_distribution.php
index 8724b16b02a15..f6a8b850b9399 100644
--- a/htdocs/core/boxes/box_graph_product_distribution.php
+++ b/htdocs/core/boxes/box_graph_product_distribution.php
@@ -165,7 +165,7 @@ public function loadBox($max = 5)
 				if (empty($data2)) {
 					$showpointvalue = 0;
 					$nocolor = 1;
-					$data2 = array(array(0=>$langs->trans("None"), 1=>1));
+					$data2 = array(array(0=>$langs->transnoentitiesnoconv("None"), 1=>1));
 				}
 
 				$filenamenb = $dir."/prodserforpropal-".$year.".png";
@@ -228,7 +228,7 @@ public function loadBox($max = 5)
 				if (empty($data3)) {
 					$showpointvalue = 0;
 					$nocolor = 1;
-					$data3 = array(array(0=>$langs->trans("None"), 1=>1));
+					$data3 = array(array(0=>$langs->transnoentitiesnoconv("None"), 1=>1));
 				}
 
 				$filenamenb = $dir."/prodserfororder-".$year.".png";
@@ -293,7 +293,7 @@ public function loadBox($max = 5)
 				if (empty($data1)) {
 					$showpointvalue = 0;
 					$nocolor = 1;
-					$data1 = array(array(0=>$langs->trans("None"), 1=>1));
+					$data1 = array(array(0=>$langs->transnoentitiesnoconv("None"), 1=>1));
 				}
 				$filenamenb = $dir."/prodserforinvoice-".$year.".png";
 				$fileurlnb = DOL_URL_ROOT.'/viewimage.php?modulepart=productstats&file=prodserforinvoice-'.$year.'.png';