diff --git a/jmclient/jmclient/wallet_utils.py b/jmclient/jmclient/wallet_utils.py
index f2b2f55..a0cb956 100644
--- a/jmclient/jmclient/wallet_utils.py
+++ b/jmclient/jmclient/wallet_utils.py
@@ -872,7 +872,7 @@ def wallet_showseed(wallet):
     seed, extension = wallet.get_mnemonic_words()
     text = "Wallet mnemonic recovery phrase:\n\n{}\n".format(seed)
     if extension:
-        text += "\nWallet mnemonic extension: {}\n".format(extension)
+        text += "\nWallet mnemonic extension: {}\n".format(extension.decode('utf-8'))
     return text
 
 
diff --git a/scripts/joinmarket-qt.py b/scripts/joinmarket-qt.py
index a3bea2b..03af8e5 100644
--- a/scripts/joinmarket-qt.py
+++ b/scripts/joinmarket-qt.py
@@ -1773,7 +1773,7 @@ class JMMainWindow(QMainWindow):
         mb.setText("<br/>".join(seed_recovery_warning))
         text = "<strong>" + words + "</strong>"
         if mnemonic_extension:
-            text += "<br/><br/>Seed extension: <strong>" + mnemonic_extension + "</strong>"
+            text += "<br/><br/>Seed extension: <strong>" + mnemonic_extension.decode('utf-8') + "</strong>"
         mb.setInformativeText(text)
         mb.setStandardButtons(QMessageBox.Ok)
         ret = mb.exec_()