diff --git a/map_machine/mapper.py b/map_machine/mapper.py
index f67cceb..9ceff9c 100644
--- a/map_machine/mapper.py
+++ b/map_machine/mapper.py
@@ -73,8 +73,8 @@ class Map:
 
         for tree in constructor.trees:
             tree.draw(self.svg, self.flinger, self.scheme)
-        for tree in constructor.craters:
-            tree.draw(self.svg, self.flinger)
+        for crater in constructor.craters:
+            crater.draw(self.svg, self.flinger)
 
         self.draw_buildings(constructor)