diff --git a/os/src/drivers/block/virtio_blk.rs b/os/src/drivers/block/virtio_blk.rs
index 34a93e0..fb2c820 100644
--- a/os/src/drivers/block/virtio_blk.rs
+++ b/os/src/drivers/block/virtio_blk.rs
@@ -1,5 +1,4 @@
 use super::BlockDevice;
-use crate::drivers::bus::virtio::VirtioHal;
 use crate::sync::{Condvar, UPIntrFreeCell};
 use crate::task::schedule;
 use crate::DEV_NON_BLOCKING_ACCESS;
diff --git a/os/src/drivers/gpu/mod.rs b/os/src/drivers/gpu/mod.rs
index b1281e1..0108f24 100644
--- a/os/src/drivers/gpu/mod.rs
+++ b/os/src/drivers/gpu/mod.rs
@@ -1,4 +1,3 @@
-use crate::drivers::bus::virtio::VirtioHal;
 use crate::sync::UPIntrFreeCell;
 use alloc::{sync::Arc, vec::Vec};
 use core::any::Any;