diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index c38d8d3a..5e1cdaed 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -1459,7 +1459,7 @@ void handle_pointer_constraint(struct wl_listener *listener, void *data) {
 void sway_cursor_constrain(struct sway_cursor *cursor,
 		struct wlr_pointer_constraint_v1 *constraint) {
 	struct seat_config *config = seat_get_config(cursor->seat);
-	if (config->allow_constrain == CONSTRAIN_DISABLE) {
+	if (!config || config->allow_constrain == CONSTRAIN_DISABLE) {
 		return;
 	}