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-rw-r--r--station_cmd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/station_cmd.c b/station_cmd.c
index e7fcb9ca2..491454573 100644
--- a/station_cmd.c
+++ b/station_cmd.c
@@ -1360,7 +1360,7 @@ int32 CmdBuildRoadStop(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
bool type = !!p2;
/* Saveguard the parameters */
- if (p1 > 3) return CMD_ERROR;
+ if (!IsValidDiagDirection(p1)) return CMD_ERROR;
SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);