diff --git a/combo_plugin_gnm/views.py b/combo_plugin_gnm/views.py
index bec9a9e..ad02463 100644
--- a/combo_plugin_gnm/views.py
+++ b/combo_plugin_gnm/views.py
@@ -117,9 +117,9 @@ def stats(request, *args, **kwargs):
     data['users']['have-more-than-suggested-tiles'] = len(manual_tiles_by_user.keys())
     data['users']['have-no-tiles'] = data['users']['count'] - data['users']['have-tiles']
     dashboard_lengths = [len(x) for x in tiles_by_user.values()]
-    dashboard_lengths.sort()
-    data['users']['max-tiles'] = max(dashboard_lengths)
     if dashboard_lengths:
+        dashboard_lengths.sort()
+        data['users']['max-tiles'] = max(dashboard_lengths)
         data['users']['median-tiles'] = dashboard_lengths[len(dashboard_lengths) // 2]
 
     return JsonResponse(data)