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-rw-r--r--src/newgrf_engine.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index ce7e7e6ea..ecf69a9eb 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -135,7 +135,7 @@ static int MapOldSubType(const Vehicle *v)
switch (v->type) {
case VEH_TRAIN:
if (IsTrainEngine(v)) return 0;
- if (IsFreeWagon(v)) return 4;
+ if (Train::From(v)->IsFreeWagon()) return 4;
return 2;
case VEH_ROAD:
case VEH_SHIP: return 0;