diff --git a/demos/gtk-demo/transparent.c b/demos/gtk-demo/transparent.c
index 10d9e81da0..626ef2c43d 100644
--- a/demos/gtk-demo/transparent.c
+++ b/demos/gtk-demo/transparent.c
@@ -1,5 +1,5 @@
 /* Overlay/Transparency
- * #Keywords: GtkOverlay, GtkSnapshot
+ * #Keywords: GtkOverlay, GtkSnapshot, blur
  *
  * Blur the background behind an overlay.
  */