diff --git a/drivers/mtk_wcn_bt/bt_hwctl_dev.c b/drivers/mtk_wcn_bt/bt_hwctl_dev.c
index 68fa5d568460..8838cb849718 100755
--- a/drivers/mtk_wcn_bt/bt_hwctl_dev.c
+++ b/drivers/mtk_wcn_bt/bt_hwctl_dev.c
@@ -384,7 +384,7 @@ static void __exit bt_hwctl_exit(void)
 {
     BT_HWCTL_DEBUG("bt_hwctl_exit\n");
     
-    platform_driver_register(&mt6622_driver);
+    platform_driver_unregister(&mt6622_driver);
     
     if (bh){
         cdev_del(&bh->cdev);