diff --git a/matrix/server.py b/matrix/server.py
index 3299c84..92ef787 100644
--- a/matrix/server.py
+++ b/matrix/server.py
@@ -45,6 +45,7 @@ from nio import (
     Response,
     Rooms,
     RoomSendResponse,
+    RoomSendError,
     SyncResponse,
     PartialSyncResponse,
     ShareGroupSessionResponse,
@@ -1287,7 +1288,7 @@ class MatrixServer(object):
         elif isinstance(response, JoinedMembersError):
             self.rooms_with_missing_members.append(response.room_id)
             self.get_joined_members(self.rooms_with_missing_members.pop())
-        elif isinstance(response, RoomSendResponse):
+        elif isinstance(response, RoomSendError):
             self.handle_own_messages_error(response)
         elif isinstance(response, ShareGroupSessionError):
             self.group_session_shared[response.room_id] = False