diff --git a/include/wlr/xwayland/xwayland.h b/include/wlr/xwayland/xwayland.h
index fd161937..372ab9a8 100644
--- a/include/wlr/xwayland/xwayland.h
+++ b/include/wlr/xwayland/xwayland.h
@@ -232,7 +232,7 @@ bool wlr_surface_is_xwayland_surface(struct wlr_surface *surface);
  * Get a struct wlr_xwayland_surface from a struct wlr_surface.
  * Asserts that the surface has the xwayland surface role.
  * May return NULL even if the surface has the xwayland surface role if the
- * corresponding xwayland surface has been destroyed.
+ * corresponding xwayland surface has been unmapped or destroyed.
  */
 struct wlr_xwayland_surface *wlr_xwayland_surface_from_wlr_surface(
 	struct wlr_surface *surface);