diff --git a/htdocs/contrat/card.php b/htdocs/contrat/card.php
index 3c64b627a5c..21d46fb2974 100644
--- a/htdocs/contrat/card.php
+++ b/htdocs/contrat/card.php
@@ -521,7 +521,9 @@ if (empty($reshook))
 				}
 
 			   	$desc = $prod->description;
-			   	$desc = dol_concatdesc($desc, $product_desc, '', !empty($conf->global->MAIN_CHANGE_ORDER_CONCAT_DESCRIPTION));
+			   	if (!empty($product_desc) && !empty($conf->global->MAIN_NO_CONCAT_DESCRIPTION)) $desc = $product_desc;
+				else $desc = dol_concatdesc($desc, $product_desc, '', !empty($conf->global->MAIN_CHANGE_ORDER_CONCAT_DESCRIPTION));
+
 				$fk_unit = $prod->fk_unit;
 			}
 			else