diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index 2f0ad6b..ccb1f46 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -1141,7 +1141,6 @@ class IPCompleter(Completer):
 
         # _greedy_changed() depends on splitter and readline being defined:
         super().__init__(
-            self,
             namespace=namespace,
             global_namespace=global_namespace,
             config=config,