diff --git a/pandoc_comments.py b/pandoc_comments.py
index 46f1d09..c95efa3 100755
--- a/pandoc_comments.py
+++ b/pandoc_comments.py
@@ -33,7 +33,7 @@ def action(k, v, fmt, meta):
 
         # Comments begin with a %
         if v[0]['t'] == 'Str' and v[0]['c'] and v[0]['c'][0] == '%':
-            return Null()
+            return []
 
     return None