diff --git a/sys/sys/file.h b/sys/sys/file.h
index 6d1b8b8e1df..820ad101557 100644
--- a/sys/sys/file.h
+++ b/sys/sys/file.h
@@ -186,7 +186,7 @@ struct file {
 	volatile u_int	f_flag;		/* see fcntl.h */
 	volatile u_int 	f_count;	/* reference count */
 	void		*f_data;	/* file descriptor specific data */
-	struct fileops	*f_ops;		/* File operations */
+	const struct fileops *f_ops;	/* File operations */
 	struct vnode 	*f_vnode;	/* NULL or applicable vnode */
 	struct ucred	*f_cred;	/* associated credentials. */
 	short		f_type;		/* descriptor type */