diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index eca7ef2..3679dcb 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -11,6 +11,7 @@ class UTXO():
         self.deleted = set()
         self.pending_deleted = set()
         self.pending_utxo = set()
+        self.checkpoint = None
         self.checkpoints = list()
         self.log = log
         self.loaded = MRU()