diff --git a/arch/risc-v/src/mpfs/hardware/mpfs_usb.h b/arch/risc-v/src/mpfs/hardware/mpfs_usb.h
index bb375c85ef..b34616e576 100644
--- a/arch/risc-v/src/mpfs/hardware/mpfs_usb.h
+++ b/arch/risc-v/src/mpfs/hardware/mpfs_usb.h
@@ -455,6 +455,7 @@ struct mpfs_usbdev_s
 
   /* USB-specific fields */
 
+  aligned_data(4)
   struct usb_ctrlreq_s ctrl;          /* Last EP0 request */
   uint8_t              devstate;      /* State of the device (see enum mpfs_devstate_e) */
   uint8_t              prevstate;     /* Previous state of the device before SUSPEND */