diff --git a/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php b/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
index 285beda21cb00..391357a1fa3ac 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
@@ -54,9 +54,11 @@ public function process(ContainerBuilder $container)
             } else {
                 $decoratedDefinition = $container->getDefinition($inner);
                 $definition->setTags($decoratedDefinition->getTags(), $definition->getTags());
+                $definition->setAutowiringTypes(array_merge($decoratedDefinition->getAutowiringTypes(), $definition->getAutowiringTypes()));
                 $public = $decoratedDefinition->isPublic();
                 $decoratedDefinition->setPublic(false);
                 $decoratedDefinition->setTags(array());
+                $decoratedDefinition->setAutowiringTypes(array());
                 $container->setDefinition($renamedId, $decoratedDefinition);
             }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
index a8b741e568d98..8459298268e9b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
@@ -142,6 +142,27 @@ public function testProcessMovesTagsFromDecoratedDefinitionToDecoratingDefinitio
         $this->assertEquals(array('name' => 'bar'), $container->getDefinition('baz')->getTags());
     }
 
+    public function testProcessMergesAutowiringTypesInDecoratingDefinitionAndRemoveThemFromDecoratedDefinition()
+    {
+        $container = new ContainerBuilder();
+
+        $container
+            ->register('parent')
+            ->addAutowiringType('Bar')
+        ;
+
+        $container
+            ->register('child')
+            ->setDecoratedService('parent')
+            ->addAutowiringType('Foo')
+        ;
+
+        $this->process($container);
+
+        $this->assertEquals(array('Bar', 'Foo'), $container->getDefinition('child')->getAutowiringTypes());
+        $this->assertEmpty($container->getDefinition('child.inner')->getAutowiringTypes());
+    }
+
     protected function process(ContainerBuilder $container)
     {
         $repeatedPass = new DecoratorServicePass();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
index dd23e162cd52b..15392fbdc18cb 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
@@ -360,8 +360,11 @@ public function testProcessMergeAutowiringTypes()
 
         $this->process($container);
 
-        $def = $container->getDefinition('child');
-        $this->assertEquals(array('Foo', 'Bar'), $def->getAutowiringTypes());
+        $childDef = $container->getDefinition('child');
+        $this->assertEquals(array('Foo', 'Bar'), $childDef->getAutowiringTypes());
+
+        $parentDef = $container->getDefinition('parent');
+        $this->assertSame(array('Foo'), $parentDef->getAutowiringTypes());
     }
 
     protected function process(ContainerBuilder $container)