diff --git a/src/Composer/Repository/PlatformRepository.php b/src/Composer/Repository/PlatformRepository.php
index e3fb895ba..bb5509752 100644
--- a/src/Composer/Repository/PlatformRepository.php
+++ b/src/Composer/Repository/PlatformRepository.php
@@ -12,6 +12,7 @@
 
 namespace Composer\Repository;
 
+use Composer\XdebugHandler;
 use Composer\Package\CompletePackage;
 use Composer\Package\PackageInterface;
 use Composer\Package\Version\VersionParser;
@@ -114,26 +115,15 @@ class PlatformRepository extends ArrayRepository
             if (in_array($name, array('standard', 'Core'))) {
                 continue;
             }
-            $extraDescription = null;
 
             $reflExt = new \ReflectionExtension($name);
-            try {
-                $prettyVersion = $reflExt->getVersion();
-                $version = $versionParser->normalize($prettyVersion);
-            } catch (\UnexpectedValueException $e) {
-                $extraDescription = ' (actual version: '.$prettyVersion.')';
-                if (preg_match('{^(\d+\.\d+\.\d+(?:\.\d+)?)}', $prettyVersion, $match)) {
-                    $prettyVersion = $match[1];
-                } else {
-                    $prettyVersion = '0';
-                }
-                $version = $versionParser->normalize($prettyVersion);
-            }
+            $prettyVersion = $reflExt->getVersion();
+            $this->addExtension($versionParser, $name, $prettyVersion);
+        }
 
-            $packageName = $this->buildPackageName($name);
-            $ext = new CompletePackage($packageName, $version, $prettyVersion);
-            $ext->setDescription('The '.$name.' PHP extension' . $extraDescription);
-            $this->addPackage($ext);
+        // Check for xdebug in a restarted process
+        if ($prettyVersion = strval(getenv(XdebugHandler::ENV_VERSION))) {
+            $this->addExtension($versionParser, 'xdebug', $prettyVersion);
         }
 
         // Another quick loop, just for possible libraries
@@ -255,6 +245,35 @@ class PlatformRepository extends ArrayRepository
         parent::addPackage($package);
     }
 
+    /**
+     * Parses the version and adds a new package to the repository
+     *
+     * @param VersionParser $versionParser
+     * @param string $name
+     * @param null|string $prettyVersion
+     */
+    private function addExtension(VersionParser $versionParser, $name, $prettyVersion)
+    {
+        $extraDescription = null;
+
+        try {
+            $version = $versionParser->normalize($prettyVersion);
+        } catch (\UnexpectedValueException $e) {
+            $extraDescription = ' (actual version: '.$prettyVersion.')';
+            if (preg_match('{^(\d+\.\d+\.\d+(?:\.\d+)?)}', $prettyVersion, $match)) {
+                $prettyVersion = $match[1];
+            } else {
+                $prettyVersion = '0';
+            }
+            $version = $versionParser->normalize($prettyVersion);
+        }
+
+        $packageName = $this->buildPackageName($name);
+        $ext = new CompletePackage($packageName, $version, $prettyVersion);
+        $ext->setDescription('The '.$name.' PHP extension'.$extraDescription);
+        $this->addPackage($ext);
+    }
+
     private function buildPackageName($name)
     {
         return 'ext-' . str_replace(' ', '-', $name);
diff --git a/src/Composer/XdebugHandler.php b/src/Composer/XdebugHandler.php
index 658d797f0..fa766122f 100644
--- a/src/Composer/XdebugHandler.php
+++ b/src/Composer/XdebugHandler.php
@@ -21,11 +21,13 @@ use Symfony\Component\Console\Output\OutputInterface;
 class XdebugHandler
 {
     const ENV_ALLOW = 'COMPOSER_ALLOW_XDEBUG';
+    const ENV_VERSION = 'COMPOSER_XDEBUG_VERSION';
     const RESTART_ID = 'internal';
 
     private $output;
     private $loaded;
     private $envScanDir;
+    private $version;
     private $tmpIni;
 
     /**
@@ -36,6 +38,11 @@ class XdebugHandler
         $this->output = $output;
         $this->loaded = extension_loaded('xdebug');
         $this->envScanDir = getenv('PHP_INI_SCAN_DIR');
+
+        if ($this->loaded) {
+            $ext = new \ReflectionExtension('xdebug');
+            $this->version = strval($ext->getVersion());
+        }
     }
 
     /**
@@ -250,6 +257,11 @@ class XdebugHandler
             return false;
         }
 
+        // Make xdebug version available to restarted process
+        if (!putenv(self::ENV_VERSION.'='.$this->version)) {
+            return false;
+        }
+
         // Flag restarted process and save env scan dir state
         $args = array(self::RESTART_ID);
 
diff --git a/tests/Composer/Test/Mock/XdebugHandlerMock.php b/tests/Composer/Test/Mock/XdebugHandlerMock.php
index 65fe07329..3b3766b87 100644
--- a/tests/Composer/Test/Mock/XdebugHandlerMock.php
+++ b/tests/Composer/Test/Mock/XdebugHandlerMock.php
@@ -18,6 +18,7 @@ class XdebugHandlerMock extends XdebugHandler
 {
     public $restarted;
     public $output;
+    public $testVersion = '2.5.0';
 
     public function __construct($loaded = null)
     {
@@ -26,10 +27,16 @@ class XdebugHandlerMock extends XdebugHandler
 
         $loaded = null === $loaded ? true: $loaded;
         $class = new \ReflectionClass(get_parent_class($this));
+
         $prop = $class->getProperty('loaded');
         $prop->setAccessible(true);
         $prop->setValue($this, $loaded);
 
+        $prop = $class->getProperty('version');
+        $prop->setAccessible(true);
+        $version = $loaded ? $this->testVersion : '';
+        $prop->setValue($this, $version);
+
         $this->restarted = false;
     }
 
diff --git a/tests/Composer/Test/XdebugHandlerTest.php b/tests/Composer/Test/XdebugHandlerTest.php
index 76340fbe5..3dd1e9f53 100644
--- a/tests/Composer/Test/XdebugHandlerTest.php
+++ b/tests/Composer/Test/XdebugHandlerTest.php
@@ -106,11 +106,30 @@ class XdebugHandlerTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('', getenv('PHP_INI_SCAN_DIR'));
     }
 
+    public function testEnvVersionWhenLoaded()
+    {
+        $loaded = true;
+
+        $xdebug = new XdebugHandlerMock($loaded);
+        $xdebug->check();
+        $this->assertEquals($xdebug->testVersion, getenv(XdebugHandlerMock::ENV_VERSION));
+    }
+
+    public function testEnvVersionWhenNotLoaded()
+    {
+        $loaded = false;
+
+        $xdebug = new XdebugHandlerMock($loaded);
+        $xdebug->check();
+        $this->assertEquals(false, getenv(XdebugHandlerMock::ENV_VERSION));
+    }
+
     public static function setUpBeforeClass()
     {
         // Save current state
         $names = array(
             XdebugHandlerMock::ENV_ALLOW,
+            XdebugHandlerMock::ENV_VERSION,
             'PHP_INI_SCAN_DIR',
             IniHelper::ENV_ORIGINAL,
         );
@@ -136,6 +155,7 @@ class XdebugHandlerTest extends \PHPUnit_Framework_TestCase
     {
         // Ensure env is unset
         putenv(XdebugHandlerMock::ENV_ALLOW);
+        putenv(XdebugHandlerMock::ENV_VERSION);
         putenv('PHP_INI_SCAN_DIR');
         putenv(IniHelper::ENV_ORIGINAL);
     }