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-rw-r--r--components/drivers/usb/usbdevice/class/mstorage.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/components/drivers/usb/usbdevice/class/mstorage.c b/components/drivers/usb/usbdevice/class/mstorage.c
index c2c753ec07..d2d59f89b2 100644
--- a/components/drivers/usb/usbdevice/class/mstorage.c
+++ b/components/drivers/usb/usbdevice/class/mstorage.c
@@ -30,6 +30,7 @@ static uep_t ep_in, ep_out;
static rt_uint8_t *buffer;
static rt_uint8_t *write_ptr;
static int status = STATUS_CBW;
+ALIGN(RT_ALIGN_SIZE)
static struct ustorage_csw csw;
static rt_device_t disk;
static rt_uint32_t _block;