diff --git a/components/drivers/sdio/mmcsd_core.c b/components/drivers/sdio/mmcsd_core.c
index b4e08e5583..234b1474a1 100644
--- a/components/drivers/sdio/mmcsd_core.c
+++ b/components/drivers/sdio/mmcsd_core.c
@@ -667,6 +667,7 @@ void mmcsd_detect(void *param)
                     continue;
                 }
                 mmcsd_host_unlock(host);
+                rt_mb_send(&mmcsd_hotpluge_mb, (rt_ubase_t)host);
             }
             else
             {