diff --git a/electrum/slip39.py b/electrum/slip39.py
index ab07fb486..6a889d476 100644
--- a/electrum/slip39.py
+++ b/electrum/slip39.py
@@ -278,7 +278,7 @@ def get_wordlist() -> Wordlist:
     return wordlist
 
 
-def process_mnemonics(mnemonics: List[str]) -> Tuple[bool, str]:
+def process_mnemonics(mnemonics: List[str]) -> Tuple[Optional[EncryptedSeed], str]:
     # Collect valid shares.
     shares = []
     for i, mnemonic in enumerate(mnemonics):