diff --git a/ipxe.py b/ipxe.py
index e7f5a3d..69171da 100755
--- a/ipxe.py
+++ b/ipxe.py
@@ -83,7 +83,8 @@ class Updater(_base.BaseUpdater):
         self.old_hash = ver_info.get(self.hash_type)
         self.old_ver = datetime.datetime.strptime(ver_info['ver'], self._datever_fmt)
         self.variant = ver_info.get('variant', self.variant)
-        self.new_hash = self.old_hash
+        # We do this to avoid the hash check in _base.BaseUpdater.download()
+        self._new_hash = self.old_hash
         self.new_date = self.old_date
         self.new_ver = self.old_ver
         if ver_info.get('arch') != self.arch:
@@ -161,11 +162,11 @@ class Updater(_base.BaseUpdater):
         if self.getRunning():
             return(None)
         if any((self.do_update, self.force_update)):
-            self.new_hash = self.getISOHash()
+            self._new_hash = self.getISOHash()
         d = {'date': self.new_date.strftime(self._date_fmt),
              'variant': self.variant,
              'ver': self.new_ver.strftime(self._datever_fmt),
-             self.hash_type: self.new_hash}
+             self.hash_type: self._new_hash}
         j = json.dumps(d, indent = 4)
         with open(self.dest_ver, 'w') as fh:
             fh.write(j)