diff --git a/deluge/core/rpcserver.py b/deluge/core/rpcserver.py
index 361d7615c..8f5e25dac 100644
--- a/deluge/core/rpcserver.py
+++ b/deluge/core/rpcserver.py
@@ -413,7 +413,7 @@ class RPCServer(component.Component):
 
         """
         for key, value in self.factory.methods.items():
-            if value.im_self == obj:
+            if value.__self__ == obj:
                 del self.factory.methods[key]
 
     def get_object_method(self, name):
diff --git a/deluge/plugins/Notifications/deluge/plugins/notifications/common.py b/deluge/plugins/Notifications/deluge/plugins/notifications/common.py
index 8bc72b961..d23eee875 100644
--- a/deluge/plugins/Notifications/deluge/plugins/notifications/common.py
+++ b/deluge/plugins/Notifications/deluge/plugins/notifications/common.py
@@ -127,7 +127,7 @@ class CustomNotifications(object):
             log.error("The event \"%s\" is not known" % eventtype)
             return False
         if known_events[eventtype].__module__.startswith('deluge.event'):
-            if handler.im_self is self:
+            if handler.__self__ is self:
                 return True
             log.error("You cannot register custom notification providers "
                       "for built-in event types.")