diff --git a/src/backend/wayland/wl_backend.c b/src/backend/wayland/wl_backend.c
index de335fd..e7b80e1 100644
--- a/src/backend/wayland/wl_backend.c
+++ b/src/backend/wayland/wl_backend.c
@@ -7579,8 +7579,10 @@ static void
 wl_overlay_draw_line(WScreen *scr, int x1, int y1, int x2, int y2)
 {
     overlay_ensure(scr);
-    if (wl_state.overlay_surf)
+    if (wl_state.overlay_surf) {
         ovl_line(wl_state.overlay_surf, x1, y1, x2, y2);
+        overlay_flush();
+    }
 }
 
 static void
@@ -7605,6 +7607,7 @@ wl_overlay_draw_rect(WScreen *scr, int x, int y, int w, int h)
     ovl_hline(s, x,     y + h, w + 1);   /* bottom */
     ovl_vline(s, x,     y,     h + 1);   /* left   */
     ovl_vline(s, x + w, y,     h + 1);   /* right  */
+    overlay_flush();
 }
 
 static void