diff --git a/kick.c b/kick.c
index f306c76..3f4f68d 100644
--- a/kick.c
+++ b/kick.c
@@ -3442,7 +3442,8 @@ static void clients_set_fullscreen(bool fs) {
         wl_list_for_each(w, &t->windows, link) {
             if (!window_initialized(w)) continue;
             window_set_fullscreen(w, fs);
-            if (!fs && (w->toplevel || w->origin != ORIGIN_GROUP ||
+            if (!fs && server.output &&
+                (w->toplevel || w->origin != ORIGIN_GROUP ||
                         w->tab != w->parent_tab)) {
                 window_set_maximized(w, true);
                 window_set_size(w, server.output->width, server.output->height);
@@ -3507,8 +3508,11 @@ static void handle_toplevel_commit(struct wl_listener *listener, void *data) {
     struct wlr_xdg_toplevel *toplevel = w->toplevel;
     if (toplevel->base->initial_commit) {
         wlr_xdg_toplevel_set_maximized(toplevel, true);
-        wlr_xdg_toplevel_set_size(toplevel, server.output->width,
-                                  server.output->height);
+        /* No output while standalone lost its VT (destroyed until the
+           connector is re-added): size then, not now, or this deref faults. */
+        if (server.output)
+            wlr_xdg_toplevel_set_size(toplevel, server.output->width,
+                                      server.output->height);
         if (server.clients_fullscreen)
             wlr_xdg_toplevel_set_fullscreen(toplevel, true);
     }