diff --git a/src/calendar-server/gnome-shell-calendar-server.c b/src/calendar-server/gnome-shell-calendar-server.c
index f184b08..3b08dd6 100644
--- a/src/calendar-server/gnome-shell-calendar-server.c
+++ b/src/calendar-server/gnome-shell-calendar-server.c
@@ -494,6 +494,8 @@ app_update_timezone (App *app)
         app->zone = icaltimezone_get_utc_timezone ();
       else
         app->zone = icaltimezone_get_builtin_timezone (location);
+      if (!zone)
+        g_printerr ("Error looking for timezone: %s\n", location);
       g_free (app->timezone_location);
       app->timezone_location = location;
       print_debug ("Using timezone %s", app->timezone_location);
