diff --git a/bsp/imx6sx/iMX6_Platform_SDK/sdk/common/usb_stack/Device/source/driver/mx6x/usb_dci_imx6.c b/bsp/imx6sx/iMX6_Platform_SDK/sdk/common/usb_stack/Device/source/driver/mx6x/usb_dci_imx6.c
index c4aa99ca78..5c96cfa3d9 100755
--- a/bsp/imx6sx/iMX6_Platform_SDK/sdk/common/usb_stack/Device/source/driver/mx6x/usb_dci_imx6.c
+++ b/bsp/imx6sx/iMX6_Platform_SDK/sdk/common/usb_stack/Device/source/driver/mx6x/usb_dci_imx6.c
@@ -183,7 +183,7 @@ uint_8 USB_DCI_Init(
     printf_info("%s\n", __func__);
 
     g_dci_controller_Id[controller_ID] = controller_ID;
-    memset(qh_buf, 0x0, sizeof(qh_buf));
+    memset(qh_buf, 0x0, TOTAL_QHD_SIZE);
 
     // Initialize hardware
     status = usbd_mx6_dev_init(controller_ID);