diff --git a/sys/sys/uio.h b/sys/sys/uio.h
--- a/sys/sys/uio.h
+++ b/sys/sys/uio.h
@@ -50,13 +50,13 @@
 #ifdef _KERNEL
 
 struct uio {
-	struct	iovec *uio_iov;		/* scatter/gather list */
-	int	uio_iovcnt;		/* length of scatter/gather list */
-	off_t	uio_offset;		/* offset in target object */
-	ssize_t	uio_resid;		/* remaining bytes to process */
-	enum	uio_seg uio_segflg;	/* address space */
-	enum	uio_rw uio_rw;		/* operation */
-	struct	thread *uio_td;		/* owner */
+	struct iovec	*uio_iov;	/* scatter/gather list */
+	int		 uio_iovcnt;	/* length of scatter/gather list */
+	off_t		 uio_offset;	/* offset in target object */
+	ssize_t		 uio_resid;	/* remaining bytes to process */
+	enum uio_seg	 uio_segflg;	/* address space */
+	enum uio_rw	 uio_rw;	/* operation */
+	struct thread	*uio_td;	/* owner */
 };
 
 /*