diff --git a/squirrelbattle/mapgeneration/broguelike.py b/squirrelbattle/mapgeneration/broguelike.py
index 96c7153..44a5716 100644
--- a/squirrelbattle/mapgeneration/broguelike.py
+++ b/squirrelbattle/mapgeneration/broguelike.py
@@ -115,7 +115,7 @@ class Generator:
                             break
                     else:
                         for i in range(l):
-                            room[y+i*dy][x+i*dx] == Tile.FLOOR
+                            room[y+i*dy][x+i*dx] = Tile.FLOOR
                         break
         return y+l*dy, x+l*dx, dy, dx