diff --git a/screenless/bureau/bureau.py b/screenless/bureau/bureau.py
index b8a8c13..51c5695 100644
--- a/screenless/bureau/bureau.py
+++ b/screenless/bureau/bureau.py
@@ -225,7 +225,7 @@ class Bureau(object):
         # run template with kwargs
         templfile = os.path.join(self.mdir, template)
         self.log.debug("printing with template: %s", templfile)
-        templ = Template(filename=templfile)
+        templ = Template(filename=templfile, strict_undefined=True)
         htmlfile.write(templ.render_unicode(**kwargs))
         htmlfile.close()
         #.encode('utf-8',