diff --git a/ports/raspberrypi/boards/wiznet_w5100s_evb_pico/mpconfigboard.h b/ports/raspberrypi/boards/wiznet_w5100s_evb_pico/mpconfigboard.h
index 111b292c8e..6265e9dd58 100644
--- a/ports/raspberrypi/boards/wiznet_w5100s_evb_pico/mpconfigboard.h
+++ b/ports/raspberrypi/boards/wiznet_w5100s_evb_pico/mpconfigboard.h
@@ -1,2 +1,9 @@
 #define MICROPY_HW_BOARD_NAME "W5100S-EVB-Pico"
 #define MICROPY_HW_MCU_NAME "rp2040"
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO18)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO19)
+#define DEFAULT_SPI_BUS_MISO (&pin_GPIO16)
+
+#define DEFAULT_UART_BUS_RX (&pin_GPIO1)
+#define DEFAULT_UART_BUS_TX (&pin_GPIO0)
\ No newline at end of file