diff options
| -rw-r--r-- | src/town_cmd.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/town_cmd.cpp b/src/town_cmd.cpp index 4d5ce792a..b6cd19bc2 100644 --- a/src/town_cmd.cpp +++ b/src/town_cmd.cpp @@ -1317,7 +1317,7 @@ static int GrowTownAtRoad(Town *t, TileIndex tile) /* Exclude the source position from the bitmask * and return if no more road blocks available */ - cur_rb &= ~DiagDirToRoadBits(ReverseDiagDir(target_dir)); + if (IsValidDiagDirection(target_dir)) cur_rb &= ~DiagDirToRoadBits(ReverseDiagDir(target_dir)); if (cur_rb == ROAD_NONE) { return _grow_town_result; } |