diff --git a/lib/wallet.py b/lib/wallet.py
index a5c33367..89467926 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -1716,8 +1716,12 @@ class OldWallet(Wallet):
             raise
 
         self.seed = mnemonic.mn_decode(words)
+
+        if not self.seed:
+            raise Exception("Invalid seed")
             
 
+
     def get_master_public_key(self):
         return self.storage.get("master_public_key")