diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
index 4a05c04fe3..cb74236757 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
@@ -2844,6 +2844,10 @@ def add_apperiph_defaults(f):
 #define HAL_RALLY_ENABLED 0
 #endif
 
+#ifndef HAL_NMEA_OUTPUT_ENABLED
+#define HAL_NMEA_OUTPUT_ENABLED 0
+#endif
+
 #ifndef HAL_CAN_DEFAULT_NODE_ID
 #define HAL_CAN_DEFAULT_NODE_ID 0
 #endif