From d9f7968aef82ca8a212b5a34097594e8ef776d27 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 18 Feb 2014 15:04:55 +0530
Subject: [PATCH] ...

---
 src/calibre/ebooks/oeb/polish/check/parsing.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/calibre/ebooks/oeb/polish/check/parsing.py b/src/calibre/ebooks/oeb/polish/check/parsing.py
index 68427cb69d..2b28c0b7cc 100644
--- a/src/calibre/ebooks/oeb/polish/check/parsing.py
+++ b/src/calibre/ebooks/oeb/polish/check/parsing.py
@@ -209,8 +209,9 @@ def check_xml_parsing(name, mt, raw):
     except Exception as err:
         return errors + [errcls(err.message, name)]
 
-    if mt in OEB_DOCS and root.nsmap.get(root.prefix, None) != XHTML_NS:
-        errors.append(BadNamespace(name, root.nsmap.get(root.prefix, None)))
+    if mt in OEB_DOCS:
+        if root.nsmap.get(root.prefix, None) != XHTML_NS:
+            errors.append(BadNamespace(name, root.nsmap.get(root.prefix, None)))
 
     return errors