diff --git a/sys/dev/usb/net/if_muge.c b/sys/dev/usb/net/if_muge.c
index 578030f87d95..aadbd87d32b8 100644
--- a/sys/dev/usb/net/if_muge.c
+++ b/sys/dev/usb/net/if_muge.c
@@ -157,9 +157,6 @@ do { \
 #define muge_err_printf(sc, fmt, args...) \
 	device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
 
-#define ETHER_IS_ZERO(addr) \
-	(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
-
 #define ETHER_IS_VALID(addr) \
 	(!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))
 
diff --git a/sys/dev/usb/net/if_smsc.c b/sys/dev/usb/net/if_smsc.c
index af88aa0ceee6..1842ec44a7cb 100644
--- a/sys/dev/usb/net/if_smsc.c
+++ b/sys/dev/usb/net/if_smsc.c
@@ -171,9 +171,6 @@ static const struct usb_device_id smsc_devs[] = {
 	device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
 	
 
-#define ETHER_IS_ZERO(addr) \
-	(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
-	
 #define ETHER_IS_VALID(addr) \
 	(!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))
 	
diff --git a/sys/dev/usb/net/if_ure.c b/sys/dev/usb/net/if_ure.c
index ff17cdf1468a..e728a039d534 100644
--- a/sys/dev/usb/net/if_ure.c
+++ b/sys/dev/usb/net/if_ure.c
@@ -68,9 +68,6 @@ SYSCTL_INT(_hw_usb_ure, OID_AUTO, debug, CTLFLAG_RWTUN, &ure_debug, 0,
     "Debug level");
 #endif
 
-#define	ETHER_IS_ZERO(addr) \
-	(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
-
 /*
  * Various supported device vendors/products.
  */
diff --git a/sys/net/ethernet.h b/sys/net/ethernet.h
index 7cc4ae35c52d..77773eee04a7 100644
--- a/sys/net/ethernet.h
+++ b/sys/net/ethernet.h
@@ -74,6 +74,9 @@ struct ether_addr {
 #define	ETHER_IS_BROADCAST(addr) \
 	(((addr)[0] & (addr)[1] & (addr)[2] & \
 	  (addr)[3] & (addr)[4] & (addr)[5]) == 0xff)
+#define	ETHER_IS_ZERO(addr) \
+	(((addr)[0] | (addr)[1] | (addr)[2] | \
+	  (addr)[3] | (addr)[4] | (addr)[5]) == 0x00)
 
 /*
  * 802.1q Virtual LAN header.