From 47df8deb58add4a7b93dedcc9da61be0be722d0f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristinn=20O=CC=88rn=20Sigur=C3=B0sson?= <kos@root.is>
Date: Thu, 4 Apr 2013 17:30:21 +0200
Subject: [PATCH] Fix the implementation.

---
 mongoengine/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mongoengine/base.py b/mongoengine/base.py
index c2d74f3d..42091568 100644
--- a/mongoengine/base.py
+++ b/mongoengine/base.py
@@ -1207,7 +1207,7 @@ class BaseDocument(object):
 
         # Determine if any changed items were actually unset.
         for path, value in set_data.items():
-            if value or isinstance(value, bool) or isinstance(value, int):
+            if value or type(value) in [bool, int]:
                 continue
 
             # If we've set a value that ain't the default value dont unset it.