$OpenBSD: patch-source_effects_cc,v 1.1 2017/05/01 21:00:15 espie Exp $
Index: source/effects.cc
--- source/effects.cc.orig
+++ source/effects.cc
@@ -13,6 +13,7 @@
 
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "externs.h"
 
