diff --git a/build_platform.py b/build_platform.py
index b3d9b2a7..f4be3827 100644
--- a/build_platform.py
+++ b/build_platform.py
@@ -74,6 +74,7 @@
     "feather_esp32s3" : ["esp32:esp32:adafruit_feather_esp32s3_nopsram", "0xc47e5767", None],
     "feather_esp32s3_4mbflash_2mbpsram" : ["esp32:esp32:adafruit_feather_esp32s3", "0xc47e5767", None],
     "feather_esp32s3_tft" : ["esp32:esp32:adafruit_feather_esp32s3_tft", "0xc47e5767", None],
+    "matrixportal_s3" : ["esp32:esp32:adafruit_matrixportal_esp32s3", "0xc47e5767", None],
     "qtpy_esp32s3" : ["esp32:esp32:adafruit_qtpy_esp32s3_nopsram", "0xc47e5767", None],
     "qtpy_esp32" : ["esp32:esp32:adafruit_qtpy_esp32_pico", None, None],
     "qtpy_esp32c3" : ["esp32:esp32:adafruit_qtpy_esp32c3:FlashMode=qio", None, None],