diff --git a/config.c b/config.c
index 15c08bc..ed7f052 100644
--- a/config.c
+++ b/config.c
@@ -34,8 +34,7 @@
 
 #include "config.h"
 #include "config-internal.h"
-
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#include "util.h"
 
 static const char *config_default_filename = SYSCONFDIR "/obmc-console.conf";