1 files changed, 1 insertions, 0 deletions
diff --git a/pref.h b/pref.h
index 37beb8faa..e3f0a545a 100644
--- a/pref.h
+++ b/pref.h
@@ -37,6 +37,7 @@ struct preferences {
 	short unit_system;
 	struct units units;
 	short show_sac;
+	bool display_unused_tanks;
 };
 enum unit_system_values { METRIC, IMPERIAL, PERSONALIZE };