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-rw-r--r--src/clear_cmd.cpp3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/clear_cmd.cpp b/src/clear_cmd.cpp
index 46598866f..858197c91 100644
--- a/src/clear_cmd.cpp
+++ b/src/clear_cmd.cpp
@@ -249,8 +249,7 @@ static void TileLoop_Clear(TileIndex tile)
/* If the tile is at any edge flood it to prevent maps without water. */
if (_settings_game.construction.freeform_edges && DistanceFromEdge(tile) == 1) {
int z;
- Slope slope = GetTileSlope(tile, &z);
- if (z == 0 && slope == SLOPE_FLAT) {
+ if (IsTileFlat(tile, &z) && z == 0) {
DoFloodTile(tile);
MarkTileDirtyByTile(tile);
return;