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-rw-r--r--src/economy.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/economy.cpp b/src/economy.cpp
index 340b6fdb7..6436f0fc0 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -815,7 +815,7 @@ Money GetTransportedGoodsIncome(uint num_pieces, uint dist, byte transit_days, C
int result = GB(callback, 0, 14);
/* Simulate a 15 bit signed value */
- if (HasBit(callback, 14)) result = 0x4000 - result;
+ if (HasBit(callback, 14)) result -= 0x4000;
/* "The result should be a signed multiplier that gets multiplied
* by the amount of cargo moved and the price factor, then gets