diff --git a/lib/Doctrine/Query/Abstract.php b/lib/Doctrine/Query/Abstract.php
index 7b69d4c47..f104e555c 100644
--- a/lib/Doctrine/Query/Abstract.php
+++ b/lib/Doctrine/Query/Abstract.php
@@ -1384,7 +1384,7 @@ public function whereIn($expr, $params = array(), $not = false)
     public function andWhereIn($expr, $params = array(), $not = false)
     {
         // if there's no params, return (else we'll get a WHERE IN (), invalid SQL)
-        if (isset($params) and (count($params) == 0)) {
+        if (isset($params) and is_array($params) and (count($params) == 0)) {
             return $this;
         }