diff --git a/anki/models.py b/anki/models.py
index d9a091bd4..84e5a9b09 100644
--- a/anki/models.py
+++ b/anki/models.py
@@ -39,6 +39,8 @@ defaultField = {
     'rtl': False,
     'font': "Arial",
     'size': 20,
+    # reserved for future use
+    'media': [],
 }
 
 defaultTemplate = {