diff --git a/pandora/user/models.py b/pandora/user/models.py
index 4234ab45..78c68483 100644
--- a/pandora/user/models.py
+++ b/pandora/user/models.py
@@ -102,6 +102,8 @@ class SessionData(models.Model):
         data, created = cls.objects.get_or_create(session_key=session_key)
         if request.user.is_authenticated:
             data.user = request.user
+        else:
+            data.user = None
         data.ip = get_ip(request)
         data.useragent = request.META.get('HTTP_USER_AGENT', '')[:4096]
         info = json.loads(request.POST.get('data', '{}'))