diff --git a/openlp/core/lib/theme.py b/openlp/core/lib/theme.py
index 70517b34d..8d2c8f356 100644
--- a/openlp/core/lib/theme.py
+++ b/openlp/core/lib/theme.py
@@ -156,7 +156,7 @@ class VerticalType(object):
     Middle = 1
     Bottom = 2
 
-boolean_list = [u'italics', u'override', u'outline', u'shadow',
+boolean_list = [u'bold', u'italics', u'override', u'outline', u'shadow',
     u'slide_transition']
 
 integer_list = [u'size', u'line_adjustment', u'x', u'height', u'y',