diff --git a/src/Symfony/Component/Locale/Stub/StubIntlDateFormatter.php b/src/Symfony/Component/Locale/Stub/StubIntlDateFormatter.php
index a448a588e2..d236fb7845 100644
--- a/src/Symfony/Component/Locale/Stub/StubIntlDateFormatter.php
+++ b/src/Symfony/Component/Locale/Stub/StubIntlDateFormatter.php
@@ -416,11 +416,13 @@ class StubIntlDateFormatter
      *
      * @see    http://www.php.net/manual/en/intldateformatter.setlenient.php
      *
-     * @throws MethodNotImplementedException
+     * @throws MethodArgumentValueNotImplementedException When $lenient is true
      */
     public function setLenient($lenient)
     {
-        throw new MethodNotImplementedException(__METHOD__);
+        if ($lenient) {
+            throw new MethodArgumentValueNotImplementedException(__METHOD__, 'lenient', $lenient, 'Only the strict parser is supported');
+        }
     }
 
     /**
diff --git a/tests/Symfony/Tests/Component/Locale/Stub/StubIntlDateFormatterTest.php b/tests/Symfony/Tests/Component/Locale/Stub/StubIntlDateFormatterTest.php
index 79bcd5299c..e289e92399 100644
--- a/tests/Symfony/Tests/Component/Locale/Stub/StubIntlDateFormatterTest.php
+++ b/tests/Symfony/Tests/Component/Locale/Stub/StubIntlDateFormatterTest.php
@@ -908,7 +908,7 @@ class StubIntlDateFormatterTest extends LocaleTestCase
     }
 
     /**
-     * @expectedException Symfony\Component\Locale\Exception\MethodNotImplementedException
+     * @expectedException Symfony\Component\Locale\Exception\MethodArgumentValueNotImplementedException
      */
     public function testSetLenient()
     {