diff --git a/app/code/community/TM/Core/Block/Adminhtml/Module/Grid.php b/app/code/community/TM/Core/Block/Adminhtml/Module/Grid.php
index bb051aa..d8c1557 100644
--- a/app/code/community/TM/Core/Block/Adminhtml/Module/Grid.php
+++ b/app/code/community/TM/Core/Block/Adminhtml/Module/Grid.php
@@ -8,6 +8,9 @@ public function __construct()
         $this->setId('moduleGrid');
         $this->setDefaultSort('release_date');
         $this->setDefaultDir('DESC');
+        $this->setDefaultFilter(array(
+            'version' => TM_Core_Block_Adminhtml_Module_Grid_Filter_Version::VERSION_AVAILABLE
+        ));
         $this->setSaveParametersInSession(true);
         $this->setUseAjax(true);
         $this->setVarNameFilter('module_filter');
@@ -31,6 +34,7 @@ protected function _prepareColumns()
         $this->addColumn('version', array(
             'header' => Mage::helper('tmcore')->__('Version'),
             'align'  => 'center',
+            'filter' => 'tmcore/adminhtml_module_grid_filter_version',
             'renderer' => 'tmcore/adminhtml_module_grid_renderer_version',
             'index'  => 'version',
             'width'  => '150px'
diff --git a/app/code/community/TM/Core/Block/Adminhtml/Module/Grid/Filter/Version.php b/app/code/community/TM/Core/Block/Adminhtml/Module/Grid/Filter/Version.php
new file mode 100644
index 0000000..2093520
--- /dev/null
+++ b/app/code/community/TM/Core/Block/Adminhtml/Module/Grid/Filter/Version.php
@@ -0,0 +1,39 @@
+<?php
+
+class TM_Core_Block_Adminhtml_Module_Grid_Filter_Version
+    extends Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Select
+{
+    const VERSION_AVAILABLE     = 'available';
+    const VERSION_UNAVAILABLE   = 'unavailable';
+
+    protected static $_options = array(
+        null                        =>  null,
+        self::VERSION_AVAILABLE     => 'Available',
+        self::VERSION_UNAVAILABLE   => 'Unavailable',
+    );
+
+    protected function _getOptions()
+    {
+        $result = array();
+        foreach (self::$_options as $code => $label) {
+            $result[] = array(
+                'value' => $code,
+                'label' => Mage::helper('adminhtml')->__($label)
+            );
+        }
+
+        return $result;
+    }
+
+    public function getCondition()
+    {
+        switch ($this->getValue()) {
+            case self::VERSION_AVAILABLE:
+                return array('neq' => '');
+            case self::VERSION_UNAVAILABLE:
+                return array('eq' => '');
+            default:
+                return null;
+        }
+    }
+}