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-rw-r--r--src/order_backup.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/order_backup.h b/src/order_backup.h
index 15a9d0bc1..81d485eb7 100644
--- a/src/order_backup.h
+++ b/src/order_backup.h
@@ -29,7 +29,7 @@ typedef Pool<OrderBackup, OrderBackupID, 1, 256> OrderBackupPool;
extern OrderBackupPool _order_backup_pool;
/** Flag to pass to the vehicle construction command when an order should be preserved. */
-static const uint32 MAKE_ORDER_BACKUP_FLAG = 1 << 31;
+static const uint32 MAKE_ORDER_BACKUP_FLAG = 1U << 31;
/**
* Data for backing up an order of a vehicle so it can be