diff --git a/squirrelbattle/mapgeneration/randomwalk.py b/squirrelbattle/mapgeneration/randomwalk.py
index ca7814b..3ef2b2d 100644
--- a/squirrelbattle/mapgeneration/randomwalk.py
+++ b/squirrelbattle/mapgeneration/randomwalk.py
@@ -107,7 +107,7 @@ class Generator:
         # post-processing: add walls
         for x in range(width):
             for y in range(height):
-                c = sum([1 if grid[j][i] == Tile.FLOOR else 0 for j, i in result.neighbours_large(y, x)])
+                c = sum([1 if grid[j][i] == Tile.FLOOR else 0 for j, i in result.large_neighbourhood(y, x)])
                 if c == 4 and self.params["no_lone_walls"]:
                     result.tiles[y][x] = Tile.FLOOR
                 elif c > 0: