diff --git a/lib/indexes.js b/lib/indexes.js
index 87688d4..21fabe2 100755
--- a/lib/indexes.js
+++ b/lib/indexes.js
@@ -174,9 +174,9 @@ class Index {
    * Update multiple documents in the index
    * If a constraint is violated, the changes need to be rolled back
    * and an error thrown
-   * @param {Array of oldDoc, newDoc pairs} pairs
+   * @param {Array<{ oldDoc: T, newDoc: T }>} pairs
    *
-   * @API private
+   * @private
    */
   updateMultipleDocs (pairs) {
     let failingIndex