diff --git a/lib/browser/modules/image-writer.js b/lib/browser/modules/image-writer.js
index 28dc6e34..9416bb94 100644
--- a/lib/browser/modules/image-writer.js
+++ b/lib/browser/modules/image-writer.js
@@ -103,6 +103,7 @@ imageWriter.service('ImageWriterService', function($q, $timeout) {
    *
    * @param {String} image - image path
    * @param {Object} drive - drive
+   * @param {Function} onProgress - in progress callback (state)
    *
    * @returns {Promise}
    *