diff --git a/platformio.ini b/platformio.ini
index afb13d0..5dd3970 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -29,6 +29,7 @@ upload_speed    = 115200
 build_flags =
     -DARDUINO_Seeed_XIAO_nRF52840_Sense
     -DNRF52840_XXAA
+    -DTARGET_SEEED_XIAO_NRF52840_SENSE
 
 ; ── Libraries ─────────────────────────────────────────────────────────────────
 ; bluefruit.h, Adafruit_LittleFS.h, InternalFileSystem.h are bundled with