diff --git a/squirrelbattle/mapgeneration/broguelike.py b/squirrelbattle/mapgeneration/broguelike.py
index 40529e5..dff9a7c 100644
--- a/squirrelbattle/mapgeneration/broguelike.py
+++ b/squirrelbattle/mapgeneration/broguelike.py
@@ -60,9 +60,9 @@ class Generator:
         for y in range(h):
             for x in range(w):
                 if level[y][x] == Tile.FLOOR:
-                    for dy, dx in Map.neighbourhood(level, y, x):
-                        if level[y+dy][x+dx] == Tile.EMPTY:
-                            level[y+dy][x+dx] = Tile.FLOOR
+                    for ny, nx in Map.neighbourhood(level, y, x):
+                        if level[ny][nx] == Tile.EMPTY:
+                            level[ny][nx] = Tile.WALL
  
     def corr_meta_info(self):
         if random() < self.params["corridor_chance"]: