diff --git a/src/Symfony/Component/Config/Builder/ConfigBuilderGenerator.php b/src/Symfony/Component/Config/Builder/ConfigBuilderGenerator.php
index fc36bb5febdab..bbb90fe9be28c 100644
--- a/src/Symfony/Component/Config/Builder/ConfigBuilderGenerator.php
+++ b/src/Symfony/Component/Config/Builder/ConfigBuilderGenerator.php
@@ -129,7 +129,7 @@ private function handleArrayNode(ArrayNode $node, ClassBuilder $class, string $n
         $class->addRequire($childClass);
         $this->classes[] = $childClass;
 
-        $property = $class->addProperty($node->getName(), $childClass->getName());
+        $property = $class->addProperty($node->getName(), $childClass->getFqcn());
         $body = '
 public function NAME(array $value = []): CLASS
 {
@@ -213,7 +213,7 @@ public function NAME(string $VAR, $VALUE): self
         $childClass = new ClassBuilder($namespace, $name);
         $class->addRequire($childClass);
         $this->classes[] = $childClass;
-        $property = $class->addProperty($node->getName(), $childClass->getName().'[]');
+        $property = $class->addProperty($node->getName(), $childClass->getFqcn().'[]');
 
         if (null === $key = $node->getKeyAttribute()) {
             $body = '
diff --git a/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.config.php b/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.config.php
index b35be9d943aab..b351c25130ed3 100644
--- a/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.config.php
+++ b/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.config.php
@@ -7,6 +7,13 @@
     $config->translator()->source('\\Acme\\Foo', 'yellow');
     $config->translator()->source('\\Acme\\Bar', 'green');
 
+    $config->messenger([
+        'routing' => [
+            'Foo\\MyArrayMessage' => [
+                'senders' => ['workqueue'],
+            ],
+        ]
+    ]);
     $config->messenger()
         ->routing('Foo\\Message')->senders(['workqueue']);
     $config->messenger()
diff --git a/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.output.php b/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.output.php
index f37659ff7cb69..2a605032f8cb9 100644
--- a/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.output.php
+++ b/src/Symfony/Component/Config/Tests/Builder/Fixtures/AddToList.output.php
@@ -10,6 +10,7 @@
     ],
     'messenger' => [
         'routing' => [
+            'Foo\\MyArrayMessage'=> ['senders'=>['workqueue']],
             'Foo\\Message'=> ['senders'=>['workqueue']],
             'Foo\\DoubleMessage' => ['senders'=>['sync', 'workqueue']],
         ],