diff --git a/src/calibre/ebooks/oeb/stylizer.py b/src/calibre/ebooks/oeb/stylizer.py
index 68ada13229..bead48ba01 100644
--- a/src/calibre/ebooks/oeb/stylizer.py
+++ b/src/calibre/ebooks/oeb/stylizer.py
@@ -341,6 +341,9 @@ class Stylizer(object):
                 size = 'xx-small'
             if size in FONT_SIZE_NAMES:
                 style['font-size'] = "%dpt" % self.profile.fnames[size]
+        if '-epub-writing-mode' in style:
+            for x in ('-webkit-writing-mode', 'writing-mode'):
+                style[x] = style.get(x, style['-epub-writing-mode'])
         return style
 
     def _apply_text_align(self, text):