diff --git a/application/Espo/Core/Utils/Util.php b/application/Espo/Core/Utils/Util.php
index ec1bd2f4ef..8b8b3123ab 100644
--- a/application/Espo/Core/Utils/Util.php
+++ b/application/Espo/Core/Utils/Util.php
@@ -790,9 +790,12 @@ class Util
 
     /**
      * Check whether values are equal.
+     * Not to be used for comparing user input values.
      *
      * @param mixed $v1
      * @param mixed $v2
+     *
+     * @internal
      */
     public static function areValuesEqual($v1, $v2, bool $isUnordered = false): bool
     {