diff --git a/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php b/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
index 6c896be550..63302c06bb 100644
--- a/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
+++ b/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
@@ -42,7 +42,7 @@ class ExpressionVoter implements VoterInterface
             $roleHierarchy = $authChecker;
             $authChecker = null;
         } elseif (null === $authChecker) {
-            @trigger_error(sprintf('Argument 3 passed to "%s()" should be an instanceof AuthorizationCheckerInterface, not passing it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Argument 3 passed to "%s()" should be an instance of AuthorizationCheckerInterface, not passing it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
         } elseif (!$authChecker instanceof AuthorizationCheckerInterface) {
             throw new \InvalidArgumentException(sprintf('Argument 3 passed to %s() must be an instance of %s or null, %s given.', __METHOD__, AuthorizationCheckerInterface::class, is_object($authChecker) ? get_class($authChecker) : gettype($authChecker)));
         }