diff --git a/testhal/STM32/STM32F7xx/USB_MSD/main.c b/testhal/STM32/STM32F7xx/USB_MSD/main.c
index cae2b74a..87ca8d28 100644
--- a/testhal/STM32/STM32F7xx/USB_MSD/main.c
+++ b/testhal/STM32/STM32F7xx/USB_MSD/main.c
@@ -102,7 +102,7 @@ int main(void) {
    * start mass storage
    */
   msdObjectInit(&USBMSD1);
-  msdStart(&USBMSD1, &USBD1, (BaseBlockDevice *)&ramdisk, blkbuf, NULL);
+  msdStart(&USBMSD1, &USBD1, (BaseBlockDevice *)&ramdisk, blkbuf, NULL, NULL);
 
   /*
    *