diff --git a/client/electrum.py b/client/electrum.py
index 3c5210cc..fec013ee 100755
--- a/client/electrum.py
+++ b/client/electrum.py
@@ -282,9 +282,9 @@ class Interface:
             out = ast.literal_eval( self.request( repr ( ('new_session', repr( ( version, addresses)) ))))
         self.session_id, self.message = out
 
-    def update_session(self):
+    def update_session(self, addresses):
         if self.use_http():
-            out = self.http_json_server.session.update(self.session_id, self.all_addresses())
+            out = self.http_json_server.session.update(self.session_id, addresses)
         else:
             out = self.request( repr ( ('update_session', repr((self.session_id, self.all_addresses())))))
         return out
diff --git a/client/gui.py b/client/gui.py
index f8414fb4..7beaf32a 100644
--- a/client/gui.py
+++ b/client/gui.py
@@ -507,7 +507,7 @@ class BitcoinGUI:
                 while True:
                     try:
                         if self.is_connected and self.update_session:
-                            self.wallet.interface.update_session()
+                            self.wallet.interface.update_session( self.wallet.all_addresses() )
                             self.update_session = False
 
                         if time.time() - get_servers_time > 5*60: