diff --git a/module/LogisticsBundle/Form/Inventory/Inventory.php b/module/LogisticsBundle/Form/Inventory/Inventory.php
index 5d53077e42..74052686da 100644
--- a/module/LogisticsBundle/Form/Inventory/Inventory.php
+++ b/module/LogisticsBundle/Form/Inventory/Inventory.php
@@ -107,6 +107,9 @@ public function init()
                         'filters' => array(
                             array('name' => 'StringTrim'),
                         ),
+                        'validators' => array(
+                            array('name' => 'Int'),
+                        ),
                     ),
                 ),
                 'attributes' => array(
@@ -146,6 +149,9 @@ public function init()
                         'filters' => array(
                             array('name' => 'StringTrim'),
                         ),
+                        'validators' => array(
+                            array('name' => 'Int'),
+                        ),
                     ),
                 ),
                 'attributes' => array(