diff -ruN libgnomecanvas-2.26.0-orig/libgnomecanvas/gnome-canvas-rich-text.c libgnomecanvas-2.26.0/libgnomecanvas/gnome-canvas-rich-text.c
--- libgnomecanvas-2.26.0-orig/libgnomecanvas/gnome-canvas-rich-text.c	2009-03-17 09:33:15.000000000 -0500
+++ libgnomecanvas-2.26.0/libgnomecanvas/gnome-canvas-rich-text.c	2021-09-12 06:57:08.000000000 -0500
@@ -28,6 +28,7 @@
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 #include <gtk/gtktextlayout.h>
+#include <gtk/gtktextdisplay.h>
 
 #include "gnome-canvas.h"
 #include "gnome-canvas-util.h"