diff --git a/addons/base/static/src/js/formats.js b/addons/base/static/src/js/formats.js
index ed25b28c16d..5180e95fbe9 100644
--- a/addons/base/static/src/js/formats.js
+++ b/addons/base/static/src/js/formats.js
@@ -28,7 +28,7 @@ openerp.base.format_value = function (value, descriptor, value_if_empty) {
         case 'float':
             var precision = descriptor.digits ? descriptor.digits[1] : 2;
             var int_part = Math.floor(value);
-            var dec_part = Math.floor((value % 1) * Math.pow(10, precision));
+            var dec_part = Math.abs(Math.floor((value % 1) * Math.pow(10, precision)));
             return _.sprintf('%d' + openerp.base._t.database.parameters.decimal_point + '%d', int_part, dec_part);
         case 'float_time':
             return _.sprintf("%02d:%02d",