--- a/src/hdalab/fields.py	Thu Feb 26 15:51:03 2015 +0100
+++ b/src/hdalab/fields.py	Thu Feb 26 10:33:10 2015 +0100
@@ -46,7 +46,7 @@
         [OneToOneField],
         [],         # Positional arguments (not used)
         {           # Keyword argument
-            "related_default": ["related_default", {"default": None}],
+            "related_default": ["related_default", {"default": None, "is_django_function": True}],
         },
     ),
 ], ["^hdalab\.fields\.OneToOneField"])
\ No newline at end of file