Index: sys/dev/usb/net/if_urndis.c
===================================================================
--- sys/dev/usb/net/if_urndis.c
+++ sys/dev/usb/net/if_urndis.c
@@ -658,7 +658,7 @@
 	msg.rm_type = htole32(REMOTE_NDIS_INITIALIZE_MSG);
 	msg.rm_len = htole32(sizeof(msg));
 	msg.rm_rid = 0;
-	msg.rm_ver_major = htole32(1);
+	msg.rm_ver_major = htole32(RNDIS_VERSION_MAJOR);
 	msg.rm_ver_minor = htole32(1);
 	msg.rm_max_xfersz = htole32(RNDIS_RX_MAXLEN);
 
Index: sys/net/rndis.h
===================================================================
--- sys/net/rndis.h
+++ sys/net/rndis.h
@@ -23,6 +23,10 @@
 #ifndef	_NET_RNDIS_H_
 #define	_NET_RNDIS_H_
 
+/* Canonical major/minor version as of 22th Aug. 2016. */
+#define	RNDIS_VERSION_MAJOR		0x00000001
+#define	RNDIS_VERSION_MINOR		0x00000000
+
 #define	RNDIS_STATUS_BUFFER_OVERFLOW 	0x80000005L
 #define	RNDIS_STATUS_FAILURE 		0xC0000001L
 #define	RNDIS_STATUS_INVALID_DATA 	0xC0010015L