diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
index b1a51bea37..6713d86eeb 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
@@ -2927,6 +2927,10 @@ def add_apperiph_defaults(f):
 #define AP_STATS_ENABLED 0
 #endif
 
+#ifndef AP_BATTERY_ESC_ENABLED
+#define AP_BATTERY_ESC_ENABLED 0
+#endif
+
 /*
  * GPS Backends - we selectively turn backends on.
  *   Note also that f103-GPS explicitly disables some of these backends.