diff --git a/sys/sys/bio.h b/sys/sys/bio.h
index 61e53d707580..d5a9b7008625 100644
--- a/sys/sys/bio.h
+++ b/sys/sys/bio.h
@@ -45,9 +45,6 @@
 #include <sys/queue.h>
 
 struct bio;
-struct buf;
-struct g_consumer;
-struct g_provider;
 
 struct iodone_chain {
 	long	ic_prev_flags;
@@ -108,6 +105,8 @@ struct bio {
 
 #ifdef _KERNEL
 
+struct uio;
+
 static __inline__ void
 biodone(struct bio *bp)
 {