diff --git a/Config/Definition/Builder/MenuNodeDefinition.php b/Config/Definition/Builder/MenuNodeDefinition.php
index 7949962..2659fda 100644
--- a/Config/Definition/Builder/MenuNodeDefinition.php
+++ b/Config/Definition/Builder/MenuNodeDefinition.php
@@ -64,7 +64,7 @@ public function menuNodeHierarchy(int $depth = 10): NodeParentInterface
                         ->end()
                     ->end()
                     ->arrayNode('extras')
-                        ->prototype('scalar')
+                        ->prototype('variable')
                         ->end()
                     ->end()
                     ->menuNode('children')->menuNodeHierarchy($depth - 1)
diff --git a/Tests/DependencyInjection/Fixtures/Bundle2/Resources/config/navigation.yml b/Tests/DependencyInjection/Fixtures/Bundle2/Resources/config/navigation.yml
index 2a6a68d..5ba1850 100644
--- a/Tests/DependencyInjection/Fixtures/Bundle2/Resources/config/navigation.yml
+++ b/Tests/DependencyInjection/Fixtures/Bundle2/Resources/config/navigation.yml
@@ -27,6 +27,9 @@ main:
             extras:
               key1: value1
               key2: value2
+              routes:
+                  - pattern: /^foo/
+                  - pattern: /^bar/
         four_item:
             label: "Four Item Label"
             order: 40
diff --git a/Tests/Provider/ConfigurationMenuProviderTest.php b/Tests/Provider/ConfigurationMenuProviderTest.php
index 4601f36..54c22d0 100644
--- a/Tests/Provider/ConfigurationMenuProviderTest.php
+++ b/Tests/Provider/ConfigurationMenuProviderTest.php
@@ -121,6 +121,8 @@ public function testGet(): void
               'key1' => 'value1',
               'key2' => 'value2',
               'routes' => array(
+                array('pattern' => '/^foo/'),
+                array('pattern' => '/^bar/'),
                 array('route' => 'my_route', 'parameters' => array('test' => 'test1'))
               )
             ),