diff --git a/src/seat.c b/src/seat.c
index 85134180c..02c0f4d00 100644
--- a/src/seat.c
+++ b/src/seat.c
@@ -998,8 +998,15 @@ create_user_session (Seat *seat, const gchar *username, gboolean autostart)
     l_debug (seat, "Creating user session");
 
     /* Load user preferences */
+    gboolean login_unknown = FALSE;
+
+    if (seat_get_string_property (seat, "login-unknown"))
+        login_unknown = seat_get_boolean_property (seat, "login-unknown");
+    else
+        login_unknown = config_get_boolean (config_get_instance (), "LightDM", "login-unknown");
+
     g_autoptr(User) user = accounts_get_user_by_name (username);
-    if (!user)
+    if (!user && !login_unknown)
     {
         l_debug (seat, "Can't login unknown user '%s'", username);
         return NULL;