diff --git a/chrome/content/zotero/xpcom/utilities_internal.js b/chrome/content/zotero/xpcom/utilities_internal.js
index bd992b32d6..339474ca70 100644
--- a/chrome/content/zotero/xpcom/utilities_internal.js
+++ b/chrome/content/zotero/xpcom/utilities_internal.js
@@ -42,7 +42,7 @@ Zotero.Utilities.Internal = {
 	 * @param {Array} arr
 	 * @param {Integer} chunkSize
 	 * @param {Function} func - A promise-returning function
-	 * @return {Array} The return values from the successive runs
+	 * @return {Promise<Array>} The return values from the successive runs
 	 */
 	forEachChunkAsync: async function (arr, chunkSize, func) {
 		var retValues = [];