diff --git a/src/hashtree.py b/src/hashtree.py
--- a/src/hashtree.py
+++ b/src/hashtree.py
@@ -38,6 +38,7 @@ class HashTree:
 
 			for i in range(nodeCount):
 				res.store[i]=f.read(HashTree.HASH_LEN)
+		return res
 
 	def save(self,filename):
 		with open(filename,"wb") as f: