diff --git a/ports/esp32s2/mpconfigport.h b/ports/esp32s2/mpconfigport.h
index db7393d8ef..9c0fd9da3e 100644
--- a/ports/esp32s2/mpconfigport.h
+++ b/ports/esp32s2/mpconfigport.h
@@ -32,6 +32,7 @@
 
 #define MICROPY_PY_UJSON                    (1)
 #define MICROPY_USE_INTERNAL_PRINTF         (0)
+#define MICROPY_PY_SYS_PLATFORM             "Espressif ESP32-S2"
 
 #include "py/circuitpy_mpconfig.h"