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-rw-r--r--src/viewport.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/viewport.cpp b/src/viewport.cpp
index 9448a51dd..c1e9e4d7b 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -2065,7 +2065,7 @@ void PlaceObject()
bool ScrollWindowTo(int x , int y, Window *w, bool instant)
{
/* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
- Point pt = MapXYZToViewport(w->viewport, x, y, GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE), Clamp(y, 0, MapSizeY() * TILE_SIZE)));
+ Point pt = MapXYZToViewport(w->viewport, x, y, GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1)));
w->viewport->follow_vehicle = INVALID_VEHICLE;
if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y)