diff --git a/sys/dev/hyperv/vmbus/hv_vmbus_priv.h b/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
index 042deec4ce7e..8461ae024dfd 100644
--- a/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
+++ b/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
@@ -635,6 +635,9 @@ typedef enum {
 extern hv_vmbus_context		hv_vmbus_g_context;
 extern hv_vmbus_connection	hv_vmbus_g_connection;
 
+extern u_int			hyperv_features;
+extern u_int			hyperv_recommends;
+
 typedef void (*vmbus_msg_handler)(hv_vmbus_channel_msg_header *msg);
 
 typedef struct hv_vmbus_channel_msg_table_entry {