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-rw-r--r--src/command.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/command.cpp b/src/command.cpp
index 6fcb1f29e..f2baa2ff6 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -670,6 +670,9 @@ CommandCost DoCommandPInternal(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd,
/* If we're needing more money and we haven't done
* anything yet, ask for the money! */
if (_additional_cash_required != 0 && res2.GetCost() == 0) {
+ /* It could happen we removed rail, thus gained money, and deleted something else.
+ * So make sure the signal buffer is empty even in this case */
+ UpdateSignalsInBuffer();
SetDParam(0, _additional_cash_required);
return_dcpi(CommandCost(STR_ERROR_NOT_ENOUGH_CASH_REQUIRES_CURRENCY), false);
}