diff --git a/lib/wallet.py b/lib/wallet.py
index fd5533d0..4c4bbf59 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -1043,7 +1043,7 @@ class Imported_Wallet(Abstract_Wallet):
     def is_watching_only(self):
         acc = self.accounts[IMPORTED_ACCOUNT]
         n = acc.keypairs.values()
-        return n == [(None, None)] * len(n)
+        return n == [[None, None]] * len(n)
 
     def has_seed(self):
         return False