diff --git a/src/saveload/compat/vehicle_sl_compat.h b/src/saveload/compat/vehicle_sl_compat.h
--- a/src/saveload/compat/vehicle_sl_compat.h
+++ b/src/saveload/compat/vehicle_sl_compat.h
@@ -75,6 +75,8 @@ const SaveLoadCompat _vehicle_common_sl_
 	SLC_VAR("breakdown_delay"),
 	SLC_VAR("breakdowns_since_last_service"),
 	SLC_VAR("breakdown_chance"),
+	SLC_VAR("breakdown_type"),
+	SLC_VAR("breakdown_severity"),
 	SLC_VAR("build_year"),
 	SLC_VAR("load_unload_ticks"),
 	SLC_VAR("cargo_paid_for"),