diff --git a/lib/services/cursor/eachAsync.js b/lib/services/cursor/eachAsync.js
index 1f28db6c812..251fe9c8252 100644
--- a/lib/services/cursor/eachAsync.js
+++ b/lib/services/cursor/eachAsync.js
@@ -30,7 +30,7 @@ module.exports = function eachAsync(next, fn, options, callback) {
     if (promise && typeof promise.then === 'function') {
       promise.then(
         function() { callback(null); },
-        function(error) { callback(error); });
+        function(error) { callback(error || new Error('`eachAsync()` promise rejected without error')); });
     } else {
       callback(null);
     }