From 13bce7843709ab3871c096355967a08dc87cb625 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 25 Feb 2016 08:29:09 +0530
Subject: [PATCH] ...

---
 src/calibre/ebooks/metadata/fb2.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/metadata/fb2.py b/src/calibre/ebooks/metadata/fb2.py
index 4271fdfaea..7fd2de3d6e 100644
--- a/src/calibre/ebooks/metadata/fb2.py
+++ b/src/calibre/ebooks/metadata/fb2.py
@@ -34,7 +34,7 @@ class Context(object):
 
     def __init__(self, root):
         try:
-            self.fb_ns = root.nsmap[root.prefix]
+            self.fb_ns = root.nsmap[root.prefix] or NAMESPACES['fb2']
         except Exception:
             self.fb_ns = NAMESPACES['fb2']
         self.namespaces = {