diff --git a/src/calibre/ebooks/oeb/stylizer.py b/src/calibre/ebooks/oeb/stylizer.py
index dba9a388d6..9a98bcd2ef 100644
--- a/src/calibre/ebooks/oeb/stylizer.py
+++ b/src/calibre/ebooks/oeb/stylizer.py
@@ -12,7 +12,7 @@ import os, re, logging, copy, unicodedata
 from weakref import WeakKeyDictionary
 from xml.dom import SyntaxErr as CSSSyntaxError
 from cssutils.css import (CSSStyleRule, CSSPageRule, CSSFontFaceRule,
-        cssproperties, CSSRule)
+        cssproperties)
 from cssutils import (profile as cssprofiles, parseString, parseStyle, log as
         cssutils_log, CSSParser, profiles, replaceUrls)
 from calibre import force_unicode, as_unicode
@@ -163,8 +163,6 @@ class Stylizer(object):
                                 self.logger.warn('CSS @import of non-CSS file %r' % rule.href)
                                 continue
                             stylesheets.append(sitem.data)
-                    for rule in tuple(stylesheet.cssRules.rulesOfType(CSSRule.PAGE_RULE)):
-                        stylesheet.cssRules.remove(rule)
                     # Make links to resources absolute, since these rules will
                     # be folded into a stylesheet at the root
                     replaceUrls(stylesheet, item.abshref,