diff --git a/htdocs/product/class/html.formproduct.class.php b/htdocs/product/class/html.formproduct.class.php
index 01064c8ffa3..1dbfbc7662f 100644
--- a/htdocs/product/class/html.formproduct.class.php
+++ b/htdocs/product/class/html.formproduct.class.php
@@ -307,7 +307,7 @@ class FormProduct
 		$return='';
 
 		$measuring_units=array();
-		if ($measuring_style == 'weight') $measuring_units=array(-6=>1,-3=>1,0=>1,3=>1,99=>1);
+		if ($measuring_style == 'weight') $measuring_units=array(-6=>1,-3=>1,0=>1,3=>1,98=>1,99=>1);
 		else if ($measuring_style == 'size') $measuring_units=array(-3=>1,-2=>1,-1=>1,0=>1,98=>1,99=>1);
         else if ($measuring_style == 'surface') $measuring_units=array(-6=>1,-4=>1,-2=>1,0=>1,98=>1,99=>1);
 		else if ($measuring_style == 'volume') $measuring_units=array(-9=>1,-6=>1,-3=>1,0=>1,88=>1,89=>1,97=>1,99=>1,/* 98=>1 */);  // Liter is not used as already available with dm3