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-rw-r--r--src/openttd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/openttd.h b/src/openttd.h
index 69df7c271..6969f1c23 100644
--- a/src/openttd.h
+++ b/src/openttd.h
@@ -67,6 +67,7 @@ typedef uint16 SignID;
typedef uint16 GroupID;
typedef uint16 EngineRenewID;
typedef uint16 DestinationID;
+typedef int32 CommandCost;
/* DestinationID must be at least as large as every these below, because it can
* be any of them