diff --git a/src/Visitor/Php/Symfony/FormTrait.php b/src/Visitor/Php/Symfony/FormTrait.php
index 71015a2..7712435 100644
--- a/src/Visitor/Php/Symfony/FormTrait.php
+++ b/src/Visitor/Php/Symfony/FormTrait.php
@@ -21,7 +21,7 @@ trait FormTrait
 {
     private bool $isFormType = false;
     private array $classMap = [];
-    private string $symfonyInterface = 'FormTypeInterface';
+    private array $symfonyInterfaces = ['FormTypeInterface', 'FormTypeExtensionInterface'];
 
     protected function isFormType(Node $node): bool
     {
@@ -32,9 +32,11 @@ protected function isFormType(Node $node): bool
         $allInterfaces = $this->getAllInterfacesFromNode($node);
 
         foreach ($allInterfaces as $interface) {
-            if ($interface === $this->symfonyInterface
-                || str_ends_with($interface, '\\'.$this->symfonyInterface)) {
-                $this->isFormType = true;
+            foreach ($this->symfonyInterfaces as $symfonyInterface) {
+                if ($interface === $symfonyInterface || str_ends_with($interface, '\\'.$symfonyInterface)) {
+                    $this->isFormType = true;
+                    break;
+                }
             }
         }
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
index 75791bd..3b800ac 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
@@ -53,6 +53,17 @@ public function testChainedChoice(): void
         $this->assertEquals('label2', $collection->get(1)->getMessage());
     }
 
+    public function testChainedChoiceExtension(): void
+    {
+        $visitor = new FormTypeChoices();
+        $visitor->setSymfonyMajorVersion(3);
+        $collection = $this->getSourceLocations($visitor, ChainedChoicedTypeExtension::class);
+
+        $this->assertCount(2, $collection, print_r($collection, true));
+        $this->assertEquals('label1', $collection->get(0)->getMessage());
+        $this->assertEquals('label2', $collection->get(1)->getMessage());
+    }
+
     public function testExtractError(): void
     {
         $collection = $this->getSourceLocations(new FormTypeChoices(), SimpleChoiceSymfony3xErrorType::class);
diff --git a/tests/Resources/Php/Symfony/ChainedChoicedTypeExtension.php b/tests/Resources/Php/Symfony/ChainedChoicedTypeExtension.php
new file mode 100644
index 0000000..7b2743c
--- /dev/null
+++ b/tests/Resources/Php/Symfony/ChainedChoicedTypeExtension.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Translation\Extractor\Tests\Resources\Php\Symfony;
+
+class ChainedChoicedTypeExtension implements FormTypeExtensionInterface
+{
+    public function buildForm(FormBuilderInterface $builder, array $options): void
+    {
+        $builder
+            ->add('name')
+            ->add('test', null, [
+                'choices' => [
+                    'label1' => 'key',
+                    'label2' => 'key',
+                ],
+            ]);
+    }
+}