diff --git a/ports/espressif/boards/adafruit_feather_esp32s2/mpconfigboard.h b/ports/espressif/boards/adafruit_feather_esp32s2/mpconfigboard.h
index 6829b7ae3b..fcd4a2cf60 100644
--- a/ports/espressif/boards/adafruit_feather_esp32s2/mpconfigboard.h
+++ b/ports/espressif/boards/adafruit_feather_esp32s2/mpconfigboard.h
@@ -44,3 +44,6 @@
 #define DEFAULT_SPI_BUS_SCK (&pin_GPIO36)
 #define DEFAULT_SPI_BUS_MOSI (&pin_GPIO35)
 #define DEFAULT_SPI_BUS_MISO (&pin_GPIO37)
+
+#define DEFAULT_UART_BUS_RX (&pin_GPIO38)
+#define DEFAULT_UART_BUS_TX (&pin_GPIO39)