diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/defaults_periph.h b/libraries/AP_HAL_ChibiOS/hwdef/scripts/defaults_periph.h
index 476217512d..306ce7bc32 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/defaults_periph.h
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/defaults_periph.h
@@ -385,3 +385,6 @@
 #define AP_TERRAIN_AVAILABLE 0
 #endif
 
+#ifndef AP_ICENGINE_ENABLED
+#define AP_ICENGINE_ENABLED 0
+#endif