From 574d9328bf51c40877ffb9766b87f27a246e8dc2 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Tue, 11 Nov 2014 11:21:47 +0100
Subject: [PATCH] ... 3.2 ...

---
 zonemaker/zone.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zonemaker/zone.py b/zonemaker/zone.py
index 330c184..add2bde 100644
--- a/zonemaker/zone.py
+++ b/zonemaker/zone.py
@@ -258,7 +258,7 @@ class Zone:
         try:
             with open(self._serialfile) as f:
                 cur_serial = int(f.read())
-        except OSError: # FileNotFoundError has been added in Python 3.3
+        except (OSError, IOError): # FileNotFoundError has been added in Python 3.3
             pass
         # increment serial
         cur_serial += 1
-- 
2.30.2