diff --git a/libsaria/trees.py b/libsaria/trees.py
index 02d0bc11..6394f020 100644
--- a/libsaria/trees.py
+++ b/libsaria/trees.py
@@ -55,7 +55,8 @@ class DLTree(Tree):
 	def walk_backwards(self, child = None):
 		key = None
 		if child != None:
-			key = [item[0] for item in self.items() if id(item[1]) == id(child)]
+			idc = id(child)
+			key = [i[0] for i in self.items() if id(i[1]) == idc]
 			if self.parent == None:
 				return key
 		ret = self.parent.walk_backwards(self)