--- src/graph.c.orig	2013-01-15 15:47:53.000000000 +0700
+++ src/graph.c	2022-12-29 08:13:06.000000000 +0700
@@ -18,6 +18,7 @@
 
 #include <stdlib.h>
 #include <inttypes.h>
+#include <string.h> /* strncmp */
 
 #include "graph.h"