diff --git a/tools/build_board_info.py b/tools/build_board_info.py
index 1534288b04..b86e6dd4ba 100755
--- a/tools/build_board_info.py
+++ b/tools/build_board_info.py
@@ -69,6 +69,7 @@ extension_by_board = {
     "microbit_v2": COMBINED_HEX,
     # stm32
     "meowbit_v121": UF2,
+    "sparkfun_stm32_thing_plus": BIN_UF2,
     # esp32c3
     "adafruit_qtpy_esp32c3": BIN,
     "ai_thinker_esp32-c3s": BIN,