diff --git a/lib/fields/input.js b/lib/fields/input.js
index a8acd06..904c828 100644
--- a/lib/fields/input.js
+++ b/lib/fields/input.js
@@ -1,6 +1,7 @@
 'use strict';
 
 var React = require('react');
+var ou = require('../objectUtils');
 var $ = React.DOM;
 
 var normalizer = require('./utils/normalizer');
@@ -26,10 +27,11 @@ var InputField = React.createClass({
     }
   },
   render: function() {
+    var value = ou.isNil(this.props.value)? '' : this.props.value;
     return $.input({
       type      : "text",
       name      : this.props.label,
-      value     : this.props.value || '',
+      value     : value,
       onKeyPress: this.handleKeyPress,
       onChange  : this.handleChange });
   }
diff --git a/lib/fields/utils/parser.js b/lib/fields/utils/parser.js
index 869176b..f3c07de 100644
--- a/lib/fields/utils/parser.js
+++ b/lib/fields/utils/parser.js
@@ -1,16 +1,16 @@
 'use strict';
 
 var normalizer = require('./normalizer');
-
+var ou = require('../../objectUtils');
 
 exports.string = function(text) {
   return normalizer.string(text);
 };
 
 exports.integer = function(text) {
-  return text ? parseInt(normalizer.integer(text)) : null;
+  return ou.isNil(text) ? null : parseInt(normalizer.integer(text));
 };
 
 exports.number = function(text) {
-  return text ? parseFloat(normalizer.number(text)) : null;
+  return ou.isNil(text) ? null : parseFloat(normalizer.number(text));
 };
diff --git a/lib/objectUtils.js b/lib/objectUtils.js
index 17e444b..be83ab9 100644
--- a/lib/objectUtils.js
+++ b/lib/objectUtils.js
@@ -24,6 +24,10 @@ var isNat = function(x) {
   return typeof x == 'number' && x >= 0 && x % 1 == 0;
 };
 
+var isNil = function(x) {
+  return (typeof x === 'undefined' || x === null);
+};
+
 var object = function() {
   var args = Array.prototype.slice.call(arguments);
   var result = [];
@@ -158,5 +162,6 @@ module.exports = {
   prune  : prune,
   split  : split,
   map    : map,
-  mapKeys: mapKeys
+  mapKeys: mapKeys,
+  isNil  : isNil
 };