diff --git a/src/Psalm/Storage/ClassLikeStorage.php b/src/Psalm/Storage/ClassLikeStorage.php
index 0119b950aea..78681da1b46 100644
--- a/src/Psalm/Storage/ClassLikeStorage.php
+++ b/src/Psalm/Storage/ClassLikeStorage.php
@@ -361,6 +361,7 @@ class ClassLikeStorage
     public $template_extended_params;
 
     /**
+     * @deprecated Will be replaced with $template_type_extends_count in Psalm v5
      * @var ?int
      */
     public $template_extended_count;