diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 40cc022f029..f72eaca0c25 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -2541,9 +2541,10 @@ class Form
 	 *	@param	array	$ajaxoptions	Options for ajax_autocompleter
 	 *  @param	int		$hidelabel		Hide label (0=no, 1=yes)
 	 *  @param  int     $alsoproductwithnosupplierprice    1=Add also product without supplier prices
+	 *  @param	string	$morecss		More CSS
 	 *	@return	void
 	 */
-	function select_produits_fournisseurs($socid, $selected='', $htmlname='productid', $filtertype='', $filtre='', $ajaxoptions=array(), $hidelabel=0, $alsoproductwithnosupplierprice=0)
+	function select_produits_fournisseurs($socid, $selected='', $htmlname='productid', $filtertype='', $filtre='', $ajaxoptions=array(), $hidelabel=0, $alsoproductwithnosupplierprice=0, $morecss='')
 	{
         // phpcs:enable
 		global $langs,$conf;
@@ -2568,7 +2569,7 @@ class Form
 		}
 		else
 		{
-			print $this->select_produits_fournisseurs_list($socid,$selected,$htmlname,$filtertype,$filtre,'',-1,0,0,$alsoproductwithnosupplierprice);
+			print $this->select_produits_fournisseurs_list($socid, $selected, $htmlname, $filtertype, $filtre, '', -1, 0, 0, $alsoproductwithnosupplierprice, $morecss);
 		}
 	}
 
@@ -2586,9 +2587,10 @@ class Form
 	 *  @param  int		$outputmode     0=HTML select string, 1=Array
 	 *  @param  int     $limit          Limit of line number
 	 *  @param  int     $alsoproductwithnosupplierprice    1=Add also product without supplier prices
+	 *  @param	string	$morecss		Add more CSS
 	 *  @return array           		Array of keys for json
 	 */
-	function select_produits_fournisseurs_list($socid,$selected='',$htmlname='productid',$filtertype='',$filtre='',$filterkey='',$statut=-1,$outputmode=0,$limit=100,$alsoproductwithnosupplierprice=0)
+	function select_produits_fournisseurs_list($socid,$selected='',$htmlname='productid',$filtertype='',$filtre='',$filterkey='',$statut=-1,$outputmode=0,$limit=100,$alsoproductwithnosupplierprice=0,$morecss='')
 	{
         // phpcs:enable
 		global $langs,$conf,$db;
@@ -2643,7 +2645,7 @@ class Form
 			$num = $this->db->num_rows($result);
 
 			//$out.='<select class="flat" id="select'.$htmlname.'" name="'.$htmlname.'">';	// remove select to have id same with combo and ajax
-			$out.='<select class="flat maxwidthonsmartphone" id="'.$htmlname.'" name="'.$htmlname.'">';
+			$out.='<select class="flat maxwidthonsmartphone'.($morecss?' '.$morecss:'').'" id="'.$htmlname.'" name="'.$htmlname.'">';
 			if (! $selected) $out.='<option value="0" selected>&nbsp;</option>';
 			else $out.='<option value="0">&nbsp;</option>';
 
diff --git a/htdocs/core/tpl/objectline_create.tpl.php b/htdocs/core/tpl/objectline_create.tpl.php
index d412c611a9d..4f04861f844 100644
--- a/htdocs/core/tpl/objectline_create.tpl.php
+++ b/htdocs/core/tpl/objectline_create.tpl.php
@@ -275,7 +275,7 @@ else {
 		        $alsoproductwithnosupplierprice=1;
 		    }
 
-			$form->select_produits_fournisseurs($object->socid, GETPOST('idprodfournprice'), 'idprodfournprice', '', '', $ajaxoptions, 1, $alsoproductwithnosupplierprice);
+		    $form->select_produits_fournisseurs($object->socid, GETPOST('idprodfournprice'), 'idprodfournprice', '', '', $ajaxoptions, 1, $alsoproductwithnosupplierprice, 'maxwidth300');
 		}
 		echo '<input type="hidden" name="pbq" id="pbq" value="">';
 		echo '</span>';