diff --git a/electrum/channel_db.py b/electrum/channel_db.py
index 8eeee39a6..33ca2020a 100644
--- a/electrum/channel_db.py
+++ b/electrum/channel_db.py
@@ -354,7 +354,7 @@ class ChannelDB(SqlDB):
     def get_200_randomly_sorted_nodes_not_in(self, node_ids):
         with self.lock:
             unshuffled = set(self._nodes.keys()) - node_ids
-        return random.sample(unshuffled, min(200, len(unshuffled)))
+        return random.sample(list(unshuffled), min(200, len(unshuffled)))
 
     def get_last_good_address(self, node_id: bytes) -> Optional[LNPeerAddr]:
         """Returns latest address we successfully connected to, for given node."""