diff --git a/src/train_gui.cpp b/src/train_gui.cpp
--- a/src/train_gui.cpp
+++ b/src/train_gui.cpp
@@ -322,10 +322,8 @@ int GetTrainDetailsWndVScroll(VehicleID 
 	int num = 0;
 
 	if (det_tab == TDW_TAB_TOTALS) { // Total cargo tab
-		CargoArray act_cargo{};
 		CargoArray max_cargo{};
 		for (const Vehicle *v = Vehicle::Get(veh_id); v != nullptr; v = v->Next()) {
-			act_cargo[v->cargo_type] += v->cargo.StoredCount();
 			max_cargo[v->cargo_type] += v->cargo_cap;
 		}