diff --git a/src/calibre/ebooks/chm/input.py b/src/calibre/ebooks/chm/input.py
index b5074e8a72..9aa8272ee9 100644
--- a/src/calibre/ebooks/chm/input.py
+++ b/src/calibre/ebooks/chm/input.py
@@ -22,7 +22,7 @@ class CHMInput(InputFormatPlugin):
     def _chmtohtml(self, output_dir, chm_path, no_images, log, debug_dump=False):
         from calibre.ebooks.chm.reader import CHMReader
         log.debug('Opening CHM file')
-        rdr = CHMReader(chm_path, log, self.opts)
+        rdr = CHMReader(chm_path, log, input_encoding=self.opts.input_encoding)
         log.debug('Extracting CHM to %s' % output_dir)
         rdr.extract_content(output_dir, debug_dump=debug_dump)
         self._chm_reader = rdr
diff --git a/src/calibre/ebooks/chm/reader.py b/src/calibre/ebooks/chm/reader.py
index 5f23ad0241..05ec388a9b 100644
--- a/src/calibre/ebooks/chm/reader.py
+++ b/src/calibre/ebooks/chm/reader.py
@@ -40,14 +40,14 @@ class CHMError(Exception):
     pass
 
 class CHMReader(CHMFile):
-    def __init__(self, input, log, opts):
+    def __init__(self, input, log, input_encoding=None):
         CHMFile.__init__(self)
         if isinstance(input, unicode):
             input = input.encode(filesystem_encoding)
         if not self.LoadCHM(input):
             raise CHMError("Unable to open CHM file '%s'"%(input,))
         self.log = log
-        self.opts = opts
+        self.input_encoding = input_encoding
         self._sourcechm = input
         self._contents = None
         self._playorder = 0
@@ -156,8 +156,8 @@ class CHMReader(CHMFile):
                     break
 
     def _reformat(self, data, htmlpath):
-        if self.opts.input_encoding:
-            data = data.decode(self.opts.input_encoding)
+        if self.input_encoding:
+            data = data.decode(self.input_encoding)
         try:
             data = xml_to_unicode(data, strip_encoding_pats=True)[0]
             soup = BeautifulSoup(data)