diff --git a/core/lib/Drupal/Core/Plugin/Validation/Constraint/LengthConstraint.php b/core/lib/Drupal/Core/Plugin/Validation/Constraint/LengthConstraint.php
index 5b23c98..5d02f22 100644
--- a/core/lib/Drupal/Core/Plugin/Validation/Constraint/LengthConstraint.php
+++ b/core/lib/Drupal/Core/Plugin/Validation/Constraint/LengthConstraint.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\Core\Plugin\Validation\Constraint\RangeConstraint.
+ * Contains \Drupal\Core\Plugin\Validation\Constraint\LengthConstraint.
  */
 
 namespace Drupal\Core\Plugin\Validation\Constraint;
diff --git a/core/lib/Drupal/Core/Validation/DrupalTranslator.php b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
index 266d935..8700526 100644
--- a/core/lib/Drupal/Core/Validation/DrupalTranslator.php
+++ b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
@@ -39,7 +39,7 @@ public function transChoice($id, $number, array $parameters = array(), $domain =
     $ids = explode('|', $id);
 
     if (!isset($ids[1])) {
-      throw new InvalidArgumentException(sprintf('The message "%s" cannot be pluralized, because it is missing a plural (e.g. "There is one apple|There are @count apples").', $id));
+      throw new \InvalidArgumentException(sprintf('The message "%s" cannot be pluralized, because it is missing a plural (e.g. "There is one apple|There are @count apples").', $id));
     }
     return format_plural($number, $ids[0], $ids[1], $this->processParameters($parameters), $this->getOptions($domain, $locale));
   }