diff --git a/variants/xiao_ble/variant.h b/variants/xiao_ble/variant.h
index e2b8eb613..77af08278 100644
--- a/variants/xiao_ble/variant.h
+++ b/variants/xiao_ble/variant.h
@@ -181,6 +181,7 @@ static const uint8_t SCL = PIN_WIRE_SCL;
 #define BAT_READ                                                                                                                 \
     14 // P0_14 = 14  Reads battery voltage from divider on signal board. (PIN_VBAT is reading voltage divider on XIAO and is
        // program pin 32 / or P0.31)
+#define BATTERY_SENSE_RESOLUTION_BITS 10
 #define CHARGE_LED 23 // P0_17 = 17  D23   YELLOW CHARGE LED
 #define HICHG 22      // P0_13 = 13  D22   Charge-select pin for Lipo for 100 mA instead of default 50mA charge