Index: head/sys/dev/hyperv/include/hyperv.h
===================================================================
--- head/sys/dev/hyperv/include/hyperv.h
+++ head/sys/dev/hyperv/include/hyperv.h
@@ -335,11 +335,6 @@
 	HV_CHANNEL_MESSAGE_INITIATED_CONTACT		= 14,
 	HV_CHANNEL_MESSAGE_VERSION_RESPONSE		= 15,
 	HV_CHANNEL_MESSAGE_UNLOAD			= 16,
-
-#ifdef	HV_VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
-	HV_CHANNEL_MESSAGE_VIEW_RANGE_ADD		= 17,
-	HV_CHANNEL_MESSAGE_VIEW_RANGE_REMOVE		= 18,
-#endif
 	HV_CHANNEL_MESSAGE_COUNT
 } hv_vmbus_channel_msg_type;