diff --git a/types/wlr_layer_shell_v1.c b/types/wlr_layer_shell_v1.c
index b6181c6dc..2d8384981 100644
--- a/types/wlr_layer_shell_v1.c
+++ b/types/wlr_layer_shell_v1.c
@@ -315,10 +315,7 @@ static const struct zwlr_layer_surface_v1_interface layer_surface_implementation
 
 uint32_t wlr_layer_surface_v1_configure(struct wlr_layer_surface_v1 *surface,
 		uint32_t width, uint32_t height) {
-	if (!surface->initialized) {
-		wlr_log(WLR_ERROR, "A configure is sent to an uninitialized wlr_layer_surface_v1 %p",
-			surface);
-	}
+	assert(surface->initialized);
 
 	struct wl_display *display =
 		wl_client_get_display(wl_resource_get_client(surface->resource));
diff --git a/types/xdg_shell/wlr_xdg_surface.c b/types/xdg_shell/wlr_xdg_surface.c
index a752ba316..5652fc26c 100644
--- a/types/xdg_shell/wlr_xdg_surface.c
+++ b/types/xdg_shell/wlr_xdg_surface.c
@@ -165,10 +165,7 @@ uint32_t wlr_xdg_surface_schedule_configure(struct wlr_xdg_surface *surface) {
 	struct wl_display *display = wl_client_get_display(surface->client->client);
 	struct wl_event_loop *loop = wl_display_get_event_loop(display);
 
-	if (!surface->initialized) {
-		wlr_log(WLR_ERROR, "A configure is scheduled for an uninitialized xdg_surface %p",
-			surface);
-	}
+	assert(surface->initialized);
 
 	if (surface->configure_idle == NULL) {
 		surface->scheduled_serial = wl_display_next_serial(display);