diff --git a/src/libprs500/ebooks/lrf/__init__.py b/src/libprs500/ebooks/lrf/__init__.py
index a81a4cbcd8..d0d001afd3 100644
--- a/src/libprs500/ebooks/lrf/__init__.py
+++ b/src/libprs500/ebooks/lrf/__init__.py
@@ -178,7 +178,8 @@ def option_parser(usage):
                       help='''Preprocess Baen HTML files to improve generated LRF.''')
     prepro.add_option('--pdftohtml', action='store_true', default=False, dest='pdftohtml',
                       help='''You must add this option if processing files generated by pdftohtml, otherwise conversion will fail.''')
-
+    prepro.add_option('--book-designer', action='store_true', default=False, dest='book_designer',
+                      help='''Use this option on html0 files from Book Designer.''')
     
     fonts = parser.add_option_group('FONT FAMILIES', 
     '''Specify trutype font families for serif, sans-serif and monospace fonts. '''