--- lib/common/shapes.c.orig	2016-09-08 04:45:03 UTC
+++ lib/common/shapes.c
@@ -13,6 +13,7 @@
 
 #include "render.h"
 #include "htmltable.h"
+#include "arith.h"
 #include <limits.h>
 
 #define RBCONST 12