diff --git a/htdocs/product/list.php b/htdocs/product/list.php
index 1fa96a91f37..9b26eecc426 100644
--- a/htdocs/product/list.php
+++ b/htdocs/product/list.php
@@ -749,20 +749,26 @@ if ($resql)
 			{
 				print '<td align="center">';
         			
-				$duration_value	= substr($obj->duration,0,dol_strlen($obj->duration)-1);
-				$duration_unit	= substr($obj->duration,-1);
-         
-				if ((float) $duration_value > 1)
+				if (preg_match('/([^a-z]+)[a-z]$/i',$obj->duration))	
 				{
-				    $dur=array("i"=>$langs->trans("Minutes"),"h"=>$langs->trans("Hours"),"d"=>$langs->trans("Days"),"w"=>$langs->trans("Weeks"),"m"=>$langs->trans("Months"),"y"=>$langs->trans("Years"));
+					$duration_value	= substr($obj->duration,0,dol_strlen($obj->duration)-1);
+					$duration_unit	= substr($obj->duration,-1);
+
+					if ((float) $duration_value > 1)
+					{
+					    $dur=array("i"=>$langs->trans("Minutes"),"h"=>$langs->trans("Hours"),"d"=>$langs->trans("Days"),"w"=>$langs->trans("Weeks"),"m"=>$langs->trans("Months"),"y"=>$langs->trans("Years"));
+					}
+					else if ((float) $duration_value > 0)
+					{
+					    $dur=array("i"=>$langs->trans("Minute"),"h"=>$langs->trans("Hour"),"d"=>$langs->trans("Day"),"w"=>$langs->trans("Week"),"m"=>$langs->trans("Month"),"y"=>$langs->trans("Year"));
+					}
+					print $duration_value;
+					print (! empty($duration_unit) && isset($dur[$duration_unit]) ? ' '.$langs->trans($dur[$duration_unit]) : '');
 				}
-				else if ((float) $duration_value > 0)
+				else
 				{
-				    $dur=array("i"=>$langs->trans("Minute"),"h"=>$langs->trans("Hour"),"d"=>$langs->trans("Day"),"w"=>$langs->trans("Week"),"m"=>$langs->trans("Month"),"y"=>$langs->trans("Year"));
+					print $obj->duration;
 				}
-				print $duration_value;
-				print (! empty($duration_unit) && isset($dur[$duration_unit]) ? ' '.$langs->trans($dur[$duration_unit]) : '');
-          
 				print '</td>';
 				if (! $i) $totalarray['nbfield']++;
 			}