diff --git a/src/Composer/Package/LinkConstraint/VersionConstraint.php b/src/Composer/Package/LinkConstraint/VersionConstraint.php
index c7cf62ff2..6e98d73a0 100644
--- a/src/Composer/Package/LinkConstraint/VersionConstraint.php
+++ b/src/Composer/Package/LinkConstraint/VersionConstraint.php
@@ -32,6 +32,7 @@ class VersionConstraint extends SpecificConstraint
      */
     public function __construct($operator, $version)
     {
+        // TODO add third parameter releaseType and match that too
         $this->operator = $operator;
         $this->version = $version;
     }
diff --git a/src/Composer/Repository/PlatformRepository.php b/src/Composer/Repository/PlatformRepository.php
index 361809e5a..2e784e24d 100644
--- a/src/Composer/Repository/PlatformRepository.php
+++ b/src/Composer/Repository/PlatformRepository.php
@@ -32,6 +32,13 @@ class PlatformRepository extends ArrayRepository
         $php = new MemoryPackage('php', $version['version'], $version['type']);
         $this->addPackage($php);
 
-        // TODO check for php extensions
+        foreach (get_loaded_extensions() as $ext) {
+            if (in_array($ext, array('standard', 'Core'))) {
+                continue;
+            }
+            // TODO maybe we could parse versions from phpinfo(INFO_MODULES)
+            $ext = new MemoryPackage('ext/'.strtolower($ext), '0', 'stable');
+            $this->addPackage($ext);
+        }
     }
 }
\ No newline at end of file