diff --git a/scripts/validate_tx b/scripts/validate_tx
index f09c4070..8fb2778c 100755
--- a/scripts/validate_tx
+++ b/scripts/validate_tx
@@ -71,6 +71,7 @@ def hash_header(res):
 
 def verify_tx(tx_hash):
     res = get_merkle(i, tx_hash)
+    assert tx_hash in res.get('merkle')
     assert res.get('merkle_root') == merkle_root(res['merkle'])
     block_height = res.get('block_height')
     _hash = None