diff --git a/lib/transaction.py b/lib/transaction.py
index baf9de4d..2429b00e 100644
--- a/lib/transaction.py
+++ b/lib/transaction.py
@@ -306,7 +306,7 @@ def parse_scriptSig(d, _bytes):
         item = decoded[0][1]
         if item[0] == 0:
             d['address'] = bitcoin.hash160_to_p2sh(bitcoin.hash_160(item))
-            d['type'] = 'p2wpkh-p2sh' if len(item) == 21 else 'p2wsh-p2sh'
+            d['type'] = 'p2wpkh-p2sh' if len(item) == 22 else 'p2wsh-p2sh'
         else:
             # payto_pubkey
             d['type'] = 'p2pk'