diff --git a/ar/peer.py b/ar/peer.py
index ec08666..74080aa 100644
--- a/ar/peer.py
+++ b/ar/peer.py
@@ -378,7 +378,7 @@ def queue(self):
         response = self._get_json('queue')
         return response
 
-    def tx_status(self, hash):
+    def tx_status(self, txid):
         '''
         Return additional information about the transaction with the given identifier (hash).