From 73f48036056b9d25b367243f45e55ae4626282d0 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 25 Oct 2012 09:43:14 +0530
Subject: [PATCH] ...

---
 src/calibre/ebooks/oeb/iterator/extract_fonts.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/oeb/iterator/extract_fonts.py b/src/calibre/ebooks/oeb/iterator/extract_fonts.py
index ccfe3bf37c..fd907f4e37 100644
--- a/src/calibre/ebooks/oeb/iterator/extract_fonts.py
+++ b/src/calibre/ebooks/oeb/iterator/extract_fonts.py
@@ -26,7 +26,8 @@ class FamilyMap(dict):
     def finalize(self):
         if self.replace_map:
             self.pat = re.compile(br'(font-family.*?)(' +
-                    b'|'.join(self.replace_map.iterkeys())+b')', re.I)
+                    b'|'.join([re.escape(x) for x in
+                        self.replace_map.iterkeys()])+b')', re.I)
 
     def replace_font_families(self, raw):
         if self.replace_map: