diff --git a/RouteDescriber/FosRestDescriber.php b/RouteDescriber/FosRestDescriber.php
index 1a4615f..fef4b18 100644
--- a/RouteDescriber/FosRestDescriber.php
+++ b/RouteDescriber/FosRestDescriber.php
@@ -54,7 +54,7 @@ final class FosRestDescriber implements RouteDescriberInterface
 
                 $normalizedRequirements = $this->normalizeRequirements($annotation->requirements);
                 if (null !== $normalizedRequirements) {
-                    $parameter->setFormat($normalizedRequirements);
+                    $parameter->setPattern($normalizedRequirements);
                 }
             }
         }
diff --git a/Tests/Functional/Controller/ApiController.php b/Tests/Functional/Controller/ApiController.php
index db401ee..8ec78ba 100644
--- a/Tests/Functional/Controller/ApiController.php
+++ b/Tests/Functional/Controller/ApiController.php
@@ -108,7 +108,7 @@ class ApiController
     /**
      * @Route("/fosrest.{_format}", methods={"POST"})
      * @QueryParam(name="foo")
-     * @RequestParam(name="bar")
+     * @RequestParam(name="bar", requirements="\d+")
      */
     public function fosrestAction()
     {
diff --git a/Tests/Functional/FunctionalTest.php b/Tests/Functional/FunctionalTest.php
index 38ff95e..2069ed3 100644
--- a/Tests/Functional/FunctionalTest.php
+++ b/Tests/Functional/FunctionalTest.php
@@ -125,6 +125,10 @@ class FunctionalTest extends WebTestCase
         $this->assertTrue($parameters->has('foo', 'query'));
         $this->assertTrue($parameters->has('bar', 'formData'));
 
+        $barParameter = $parameters->get('bar', 'formData');
+        $this->assertNotNull($barParameter->getPattern());
+        $this->assertEquals('\d+', $barParameter->getPattern());
+
         // The _format path attribute should be removed
         $this->assertFalse($parameters->has('_format', 'path'));
     }