diff --git a/sys/dev/io/iodev.c b/sys/dev/io/iodev.c
index 7c7ee9cae45..8c2cebdf364 100644
--- a/sys/dev/io/iodev.c
+++ b/sys/dev/io/iodev.c
@@ -52,7 +52,6 @@ static struct cdev *iodev;
 
 static struct cdevsw io_cdevsw = {
 	.d_version =	D_VERSION,
-	.d_flags =	D_NEEDGIANT,
 	.d_open =	ioopen,
 	.d_close =	ioclose,
 	.d_name =	"io",