diff --git a/pelican/settings.py b/pelican/settings.py
index 8f0dcdbd..c9795a08 100644
--- a/pelican/settings.py
+++ b/pelican/settings.py
@@ -22,6 +22,7 @@ _DEFAULT_CONFIG = {'PATH': None,
                    'CLEAN_URLS': False, # use /blah/ instead /blah.html in urls
                    'RELATIVE_URLS': True,
                    'DEFAULT_LANG': 'en',
+                   'JINJA_EXTENSIONS': [],
                   }
 
 def read_settings(filename):