diff --git a/src/Symfony/Component/DependencyInjection/ChildDefinition.php b/src/Symfony/Component/DependencyInjection/ChildDefinition.php
index f363a64829c2..61460ca2e0f7 100644
--- a/src/Symfony/Component/DependencyInjection/ChildDefinition.php
+++ b/src/Symfony/Component/DependencyInjection/ChildDefinition.php
@@ -121,14 +121,6 @@ public function setInstanceofConditionals(array $instanceof)
     {
         throw new BadMethodCallException('A ChildDefinition cannot have instanceof conditionals set on it.');
     }
-
-    /**
-     * @internal
-     */
-    public function setBindings(array $bindings)
-    {
-        throw new BadMethodCallException('A ChildDefinition cannot have bindings set on it.');
-    }
 }
 
 class_alias(ChildDefinition::class, DefinitionDecorator::class);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
index a124e472aca8..eefb0cefd4ff 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
@@ -103,7 +103,7 @@ private function doResolveDefinition(ChildDefinition $definition)
         $def->setAutowired($parentDef->isAutowired());
         $def->setChanges($parentDef->getChanges());
 
-        $def->setBindings($parentDef->getBindings());
+        $def->setBindings($definition->getBindings() + $parentDef->getBindings());
 
         // overwrite with values specified in the decorator
         $changes = $definition->getChanges();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
index 23a1915fd777..18c0fb7c5987 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
@@ -382,6 +382,27 @@ public function testProcessSetsArguments()
         $this->assertSame(array(2, 1, 'foo' => 3), $def->getArguments());
     }
 
+    public function testBindings()
+    {
+        $container = new ContainerBuilder();
+
+        $container->register('parent', 'stdClass')
+            ->setBindings(array('a' => '1', 'b' => '2'))
+        ;
+
+        $child = $container->setDefinition('child', new ChildDefinition('parent'))
+            ->setBindings(array('b' => 'B', 'c' => 'C'))
+        ;
+
+        $this->process($container);
+
+        $bindings = array();
+        foreach ($container->getDefinition('child')->getBindings() as $k => $v) {
+            $bindings[$k] = $v->getValues()[0];
+        }
+        $this->assertEquals(array('b' => 'B', 'c' => 'C', 'a' => '1'), $bindings);
+    }
+
     public function testSetAutoconfiguredOnServiceIsParent()
     {
         $container = new ContainerBuilder();