diff --git a/sway/lock.c b/sway/lock.c
index bf7d5de89..6e7aae77e 100644
--- a/sway/lock.c
+++ b/sway/lock.c
@@ -13,7 +13,6 @@ struct sway_session_lock_surface {
 	struct wl_listener map;
 	struct wl_listener destroy;
 	struct wl_listener surface_commit;
-	struct wl_listener output_mode;
 	struct wl_listener output_commit;
 	struct wl_listener output_destroy;
 };
@@ -40,12 +39,6 @@ static void handle_surface_commit(struct wl_listener *listener, void *data) {
 	output_damage_surface(surf->output, 0, 0, surf->surface, false);
 }
 
-static void handle_output_mode(struct wl_listener *listener, void *data) {
-	struct sway_session_lock_surface *surf = wl_container_of(listener, surf, output_mode);
-	wlr_session_lock_surface_v1_configure(surf->lock_surface,
-		surf->output->width, surf->output->height);
-}
-
 static void handle_output_commit(struct wl_listener *listener, void *data) {
 	struct wlr_output_event_commit *event = data;
 	struct sway_session_lock_surface *surf = wl_container_of(listener, surf, output_commit);
@@ -76,7 +69,6 @@ static void destroy_lock_surface(struct sway_session_lock_surface *surf) {
 	wl_list_remove(&surf->map.link);
 	wl_list_remove(&surf->destroy.link);
 	wl_list_remove(&surf->surface_commit.link);
-	wl_list_remove(&surf->output_mode.link);
 	wl_list_remove(&surf->output_commit.link);
 	wl_list_remove(&surf->output_destroy.link);
 	output_damage_whole(surf->output);
@@ -115,8 +107,6 @@ static void handle_new_surface(struct wl_listener *listener, void *data) {
 	wl_signal_add(&lock_surface->events.destroy, &surf->destroy);
 	surf->surface_commit.notify = handle_surface_commit;
 	wl_signal_add(&surf->surface->events.commit, &surf->surface_commit);
-	surf->output_mode.notify = handle_output_mode;
-	wl_signal_add(&output->wlr_output->events.mode, &surf->output_mode);
 	surf->output_commit.notify = handle_output_commit;
 	wl_signal_add(&output->wlr_output->events.commit, &surf->output_commit);
 	surf->output_destroy.notify = handle_output_destroy;