diff --git a/htdocs/product/list.php b/htdocs/product/list.php
index 9794e218585..b1dbb2609e1 100644
--- a/htdocs/product/list.php
+++ b/htdocs/product/list.php
@@ -237,7 +237,7 @@ if ($conf->global->PRODUIT_MULTIPRICES) {
 		} else {
 			$labelp = $langs->trans("SellingPrice")." ".$i;
 		}
-		$arrayfields['p.sellprice'.$i] = array('label'=>$labelp, 'checked'=>1, 'enabled'=>$conf->global->PRODUIT_MULTIPRICES, 'position'=>'40.'.$i);
+		$arrayfields['p.sellprice'.$i] = array('label'=>$labelp, 'checked'=>1, 'enabled'=>$conf->global->PRODUIT_MULTIPRICES, 'position'=>floatval('40.'.sprintf('%03s', $i)));
 		$arraypricelevel[$i] = array($i);
 	}
 }