diff --git a/dungeonbattle/mapgeneration/randomwalk.py b/dungeonbattle/mapgeneration/randomwalk.py
index 3dc3906..60baaba 100644
--- a/dungeonbattle/mapgeneration/randomwalk.py
+++ b/dungeonbattle/mapgeneration/randomwalk.py
@@ -44,7 +44,7 @@ class Walker:
         if 0 < nx < width and 0 < ny < height:
             self.x, self.y = nx, ny
 
-    def split():
+    def split(self):
         child = Walker(self.x, self.y)
         child.dir = self.dir
         return child