diff --git a/sys/dev/null/null.c b/sys/dev/null/null.c
index 3005c19..a83be6f 100644
--- a/sys/dev/null/null.c
+++ b/sys/dev/null/null.c
@@ -47,11 +47,12 @@ static struct cdev *zero_dev;
 
 static d_write_t null_write;
 static d_ioctl_t null_ioctl;
+static d_read_t null_read;
 static d_read_t zero_read;
 
 static struct cdevsw null_cdevsw = {
 	.d_version =	D_VERSION,
-	.d_read =	(d_read_t *)nullop,
+	.d_read =	null_read,
 	.d_write =	null_write,
 	.d_ioctl =	null_ioctl,
 	.d_name =	"null",
@@ -71,6 +72,19 @@ static void *zbuf;
 static int
 null_write(struct cdev *dev __unused, struct uio *uio, int flags __unused)
 {
+
+	uio->uio_offset += uio->uio_resid;
+	uio->uio_resid = 0;
+
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+null_read(struct cdev *dev __unused, struct uio *uio, int flags __unused)
+{
+
+	uio->uio_offset += uio->uio_resid;
 	uio->uio_resid = 0;
 
 	return (0);