diff --git a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
index 3039885ec2fc9..f3923789ca43d 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
@@ -26,8 +26,6 @@
 /**
  * YamlFileLoader loads YAML files service definitions.
  *
- * The YAML format does not support anonymous services (cf. the XML loader).
- *
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class YamlFileLoader extends FileLoader
@@ -50,6 +48,9 @@ public function load($resource, $type = null)
             return;
         }
 
+        // anonymous services
+        $this->processAnonymousServices($content, $path);
+
         // imports
         $this->parseImports($content, $path);
 
@@ -360,6 +361,63 @@ protected function loadFile($file)
         return $this->validate($configuration, $file);
     }
 
+    /**
+     * Processes anonymous services.
+     *
+     * @param array  $content
+     * @param string $path
+     */
+    private function processAnonymousServices(array &$content, $path)
+    {
+        $definitions = array();
+        $count = 0;
+
+        if (false === array_key_exists('services', $content) || false === is_array($content['services']))
+        {
+            return;
+        }
+
+        foreach ($content['services'] as $id => &$service)
+        {
+            if (false === is_array($service))
+            {
+                continue;
+            }
+
+            // TODO covert "properties" key also
+            if (false === array_key_exists('arguments', (array) $service))
+            {
+                continue;
+            }
+
+            foreach ($service['arguments'] as &$argument)
+            {
+                if (false === is_array($argument))
+                {
+                    continue;
+                }
+
+                if (false === array_key_exists('type', $argument) || 'service' !== $argument['type'])
+                {
+                    continue;
+                }
+
+                $id = sprintf('%s_%d', hash('sha256', $path), ++$count);
+                $argument['id'] = $id;
+                $definitions[$id] = array(&$argument, $path);
+            }
+        }
+
+        // resolve definitions
+        ksort($definitions);
+        foreach ($definitions as $id => $def) {
+            $serviceDef = &$def[0];
+            $serviceDef['public'] = false;
+            $this->parseDefinition($id, (array) $def[0], $def[1]);
+            $serviceDef = '@'.$id;
+        }
+    }
+
     /**
      * Validates a YAML file.
      *
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/anonymous_services.yml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/anonymous_services.yml
new file mode 100644
index 0000000000000..6d7b717a3abf8
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/anonymous_services.yml
@@ -0,0 +1,11 @@
+services:
+    service_with_anonymous_services:
+        class: FooClass
+        arguments: [{type: service, class: BazClass}]
+    another_service_with_anonymous_services:
+        class: FooClass
+        arguments:
+            - type: service
+              class: BazClass
+            - type: service
+              class: BarClass
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
index 8ab714e43a2c4..6d2542ea22a83 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
@@ -177,6 +177,24 @@ public function testLoadServices()
         $this->assertEquals(array('decorated', 'decorated.pif-pouf', 5), $services['decorator_service_with_name_and_priority']->getDecoratedService());
     }
 
+    public function testAnonymousServices()
+    {
+        $container = new ContainerBuilder();
+        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
+        $loader->load('anonymous_services.yml');
+        $services = $container->getDefinitions();
+        $arguments = $services['service_with_anonymous_services']->getArguments();
+        $arguments2 = $services['another_service_with_anonymous_services']->getArguments();
+        $this->assertCount(1, $arguments);
+        $this->assertCount(2, $arguments2);
+        $this->assertInstanceOf('Symfony\\Component\\DependencyInjection\\Reference', $arguments[0]);
+        $this->assertInstanceOf('Symfony\\Component\\DependencyInjection\\Reference', $arguments2[0]);
+        $this->assertInstanceOf('Symfony\\Component\\DependencyInjection\\Reference', $arguments2[1]);
+        $this->assertEquals('BazClass', $services[(string) $arguments[0]]->getClass());
+        $this->assertEquals('BazClass', $services[(string) $arguments2[0]]->getClass());
+        $this->assertEquals('BarClass', $services[(string) $arguments2[1]]->getClass());
+    }
+
     public function testLoadFactoryShortSyntax()
     {
         $container = new ContainerBuilder();