diff --git a/lib/Doctrine/ORM/Mapping/MappingException.php b/lib/Doctrine/ORM/Mapping/MappingException.php
index 875f9f07594..2d069cdc420 100644
--- a/lib/Doctrine/ORM/Mapping/MappingException.php
+++ b/lib/Doctrine/ORM/Mapping/MappingException.php
@@ -824,7 +824,8 @@ public static function invalidFetchMode($className, $annotation)
         return new self("Entity '" . $className . "' has a mapping with invalid fetch mode '" . $annotation . "'");
     }
 
-    public static function invalidGeneratedMode(string $annotation): MappingException
+    /** @param int|string $annotation */
+    public static function invalidGeneratedMode($annotation): MappingException
     {
         return new self("Invalid generated mode '" . $annotation . "'");
     }