diff --git a/lib/dao.js b/lib/dao.js
index 81e943ea..9527d17d 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -1530,6 +1530,8 @@ DataAccessObject.updateAll = function (where, data, options, cb) {
     try {
       where = removeUndefined(where);
       where = Model._coerce(where);
+      data = removeUndefined(data);
+      data = Model._coerce(data);
     } catch (err) {
       return process.nextTick(function () {
         cb(err);