Index: gtkhid-cairo.c
===================================================================
--- gtkhid-cairo.c	(revision 24681)
+++ gtkhid-cairo.c	(revision 24682)
@@ -1542,6 +1542,8 @@
 	priv->cr_target = p;
 	priv->cr = p;
 	cairo_save(p);
+	/* clear background */
+	erase_with_background_color(p, &priv->bg_color);
 	/* calls the off-line drawing routine */
 	expcall(&gtk3_cairo_hid, ctx);
 	cairo_restore(p);