diff --git a/src/InternalDoc.php b/src/InternalDoc.php
index 0e95a5fca..73a32433b 100644
--- a/src/InternalDoc.php
+++ b/src/InternalDoc.php
@@ -657,7 +657,7 @@ abstract class InternalDoc
      *
      * Returns a vector hash.
      *
-     * @param array<int|string> $longs IDs
+     * @param array $longs IDs
      */
     final public static function genVectorHash(array $longs): string
     {