diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 262b2ea576a38e4bb7d1c442f2dfcbc2c40fa302..f82d54e0208c32bd31ce9dfd0ddd0f99129c625d 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -763,8 +763,7 @@ struct netvsc_device {
 
 	refcount_t sc_offered;
 
-	/* Holds rndis device info */
-	void *extension;
+	struct rndis_device *extension;
 
 	int ring_size;