diff --git a/src/calibre/ebooks/mobi/mobiml.py b/src/calibre/ebooks/mobi/mobiml.py
index 6c2af3795d..4dfcf5d7b6 100644
--- a/src/calibre/ebooks/mobi/mobiml.py
+++ b/src/calibre/ebooks/mobi/mobiml.py
@@ -368,7 +368,7 @@ class MobiMLizer(object):
         istate.strikethrough = style['text-decoration'] == 'line-through'
         istate.underline = style['text-decoration'] == 'underline'
         ff = style['font-family'].lower() if style['font-family'] else ''
-        if 'monospace' in ff or 'courier' in ff:
+        if 'monospace' in ff or 'courier' in ff or ff.endswith(' mono'):
             istate.family = 'monospace'
         elif ('sans-serif' in ff or 'sansserif' in ff or 'verdana' in ff or
                 'arial' in ff or 'helvetica' in ff):