diff --git a/src/DI/Extensions/ExtensionsExtension.php b/src/DI/Extensions/ExtensionsExtension.php
index b6123702c..9c4b3874c 100644
--- a/src/DI/Extensions/ExtensionsExtension.php
+++ b/src/DI/Extensions/ExtensionsExtension.php
@@ -21,7 +21,12 @@ class ExtensionsExtension extends Nette\DI\CompilerExtension
 	public function loadConfiguration()
 	{
 		foreach ($this->getConfig() as $name => $class) {
-			$this->compiler->addExtension($name, new $class);
+			if ($class instanceof \stdClass) {
+				$rc = Nette\Reflection\ClassType::from($class->value);
+				$this->compiler->addExtension($name, $rc->newInstanceArgs($class->attributes));
+			} else {
+				$this->compiler->addExtension($name, new $class);
+			}
 		}
 	}
 
diff --git a/tests/DI/Compiler.extension.extensions.phpt b/tests/DI/Compiler.extension.extensions.phpt
index 1b34da498..8a1dc0578 100644
--- a/tests/DI/Compiler.extension.extensions.phpt
+++ b/tests/DI/Compiler.extension.extensions.phpt
@@ -20,11 +20,31 @@ class FooExtension extends DI\CompilerExtension
 }
 
 
+class BarExtension extends DI\CompilerExtension
+{
+	private $param;
+
+	public function __construct($param)
+	{
+		$this->param = $param;
+	}
+
+	function loadConfiguration()
+	{
+		$this->getContainerBuilder()->parameters['bar'] = $this->param;
+	}
+}
+
+
 $compiler = new DI\Compiler;
 $compiler->addExtension('extensions', new Nette\DI\Extensions\ExtensionsExtension);
 $container = createContainer($compiler, '
+parameters:
+	param: test
+
 extensions:
 	foo: FooExtension
+	bar: BarExtension(%param%)
 
 foo:
 	key: value
@@ -32,3 +52,4 @@ foo:
 
 
 Assert::same( 'hello', $container->parameters['foo'] );
+Assert::same( 'test', $container->parameters['bar'] );