diff --git a/inventory-app/doorboy.py b/inventory-app/doorboy.py
index 121f0f4..a8b291a 100644
--- a/inventory-app/doorboy.py
+++ b/inventory-app/doorboy.py
@@ -221,7 +221,7 @@ def view_doorboy_admin():
 
     orphaned_keyfobs = sorted(orphaned_keyfobs, key = lambda o : (not bool(o.get("comment")), o.get("comment", "")))
     no_keyfobs = sorted(no_keyfobs, key = lambda u : u.display_name or u.username)
-    last_seen = dict(sorted(last_seen.items(), key = lambda item: item[1], reverse=True))
+    last_seen = dict(sorted(last_seen.items(), key = lambda item: item[1] or datetime.min, reverse=True))
     return render_template("doorboy_admin.html", **locals())
 
 @page_doorboy.route("/m/doorboy/swipes")