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-rw-r--r--viewport.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/viewport.c b/viewport.c
index 5b1712b2c..05e461431 100644
--- a/viewport.c
+++ b/viewport.c
@@ -1376,7 +1376,8 @@ void MarkTileDirty(int x, int y)
{
int z = 0;
Point pt;
- if (IS_INT_INSIDE(x, 0, TILES_X*16) && IS_INT_INSIDE(y, 0, TILES_Y*16))
+ if (IS_INT_INSIDE(x, 0, MapSizeX() * 16) &&
+ IS_INT_INSIDE(y, 0, MapSizeY() * 16))
z = GetTileZ(TILE_FROM_XY(x,y));
pt = RemapCoords(x, y, z);