diff --git a/electrum b/electrum
index 53de47fc..18c915a5 100755
--- a/electrum
+++ b/electrum
@@ -233,7 +233,7 @@ if __name__ == '__main__':
 
             if len(seed) == 128:
                 wallet.seed = None
-                wallet.sequence.master_public_key = seed
+                wallet.init_sequence(str(seed))
             else:
                 wallet.seed = str(seed)
                 wallet.init_mpk( wallet.seed )
diff --git a/lib/wallet.py b/lib/wallet.py
index 5341f194..feff4fc1 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -216,6 +216,7 @@ class Wallet:
         return self.get_private_keys([address], password).get(address)
 
     def get_private_keys(self, addresses, password):
+        if not self.seed: return {}
         # decode seed in any case, in order to test the password
         seed = self.decode_seed(password)
         out = {}
@@ -776,8 +777,9 @@ class Wallet:
             pk_addresses.append(pk_addr)
 
         # get all private keys at once.
-        private_keys = self.get_private_keys(pk_addresses, password)
-        tx.sign(private_keys)
+        if self.seed:
+            private_keys = self.get_private_keys(pk_addresses, password)
+            tx.sign(private_keys)
 
         for address, x in outputs:
             if address not in self.addressbook and not self.is_mine(address):