diff --git a/src/Symfony/Component/Security/Acl/Domain/RoleSecurityIdentity.php b/src/Symfony/Component/Security/Acl/Domain/RoleSecurityIdentity.php
index 0d3d0d2ca2b14..da08a12e84af4 100644
--- a/src/Symfony/Component/Security/Acl/Domain/RoleSecurityIdentity.php
+++ b/src/Symfony/Component/Security/Acl/Domain/RoleSecurityIdentity.php
@@ -30,7 +30,7 @@ final class RoleSecurityIdentity implements SecurityIdentityInterface
      */
     public function __construct($role)
     {
-        if ($role instanceof Role) {
+        if ($role instanceof RoleInterface) {
             $role = $role->getRole();
         }