diff --git a/ports/nrf/mphalport.h b/ports/nrf/mphalport.h
index b374da403..e99acf8d6 100644
--- a/ports/nrf/mphalport.h
+++ b/ports/nrf/mphalport.h
@@ -52,6 +52,10 @@ extern const unsigned char mp_hal_status_to_errno_table[4];
 NORETURN void mp_hal_raise(HAL_StatusTypeDef status);
 void mp_hal_set_interrupt_char(int c); // -1 to disable
 
+#if MICROPY_PY_BLE_NUS
+#define mp_hal_stdio_poll(poll_flags) (0)
+#endif
+
 int mp_hal_stdin_rx_chr(void);
 void mp_hal_stdout_tx_str(const char *str);