diff --git a/src/util.h b/src/util.h
index 2747538d..153a8ae6 100644
--- a/src/util.h
+++ b/src/util.h
@@ -32,6 +32,9 @@
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 
+#define MAC "%02x:%02x:%02x:%02x:%02x:%02x"
+#define MAC_STR(a) a[0], a[1], a[2], a[3], a[4], a[5]
+
 const char *util_ssid_to_utf8(size_t len, const uint8_t *ssid);
 bool util_ssid_is_utf8(size_t len, const uint8_t *ssid);
 const char *util_address_to_string(const uint8_t *addr);