diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index cf754586c9f..26bb1125cbf 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -4247,7 +4247,7 @@ class OrderLine extends CommonOrderLine
 
 	/**
 	 * Buy price without taxes
-	 * @var float|null
+	 * @var float|string|null
 	 */
 	public $pa_ht;
 	public $marge_tx;