diff --git a/src/or/router.c b/src/or/router.c
index 160f661baa..3ae6d1a24a 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -479,6 +479,7 @@ router_dirport_found_reachable(void)
     log_notice(LD_DIRSERV,"Self-testing indicates your DirPort is reachable "
                "from the outside. Excellent.");
     can_reach_dir_port = 1;
+    mark_my_descriptor_dirty();
   }
 }