diff --git a/src/portable/nordic/nrf5x/dcd_nrf5x.c b/src/portable/nordic/nrf5x/dcd_nrf5x.c
index 6b8095a0..3bb9bd37 100644
--- a/src/portable/nordic/nrf5x/dcd_nrf5x.c
+++ b/src/portable/nordic/nrf5x/dcd_nrf5x.c
@@ -924,8 +924,8 @@ void tusb_hal_nrf_power_event (uint32_t event)
 
       if ( nrfx_usbd_errata_166() )
       {
-        *((volatile uint32_t *) (NRF_USBD_BASE + 0x800)) = 0x7E3;
-        *((volatile uint32_t *) (NRF_USBD_BASE + 0x804)) = 0x40;
+        *((volatile uint32_t *) ((uint8_t *) (NRF_USBD) + 0x800)) = 0x7E3;
+        *((volatile uint32_t *) ((uint8_t *) (NRF_USBD) + 0x804)) = 0x40;
 
         __ISB(); __DSB();
       }