diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index cb298c2..8ebf126 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -416,14 +416,14 @@ class IPCompleter(Completer):
         When 0: nothing will be excluded.
         """
     )
-    limit_to__all__ = Enum((0,1), default_value=0, config=True,
+    limit_to__all__ = CBool(default_value=False, config=True,
         help="""Instruct the completer to use __all__ for the completion
         
         Specifically, when completing on ``object.<tab>``.
         
-        When 1: only those names in obj.__all__ will be included.
+        When True: only those names in obj.__all__ will be included.
         
-        When 0 [default]: the values in the __all__ attribute are ignored
+        When False [default]: the __all__ attribute is ignored 
         """
     )
 
diff --git a/IPython/core/magic.py b/IPython/core/magic.py
index 7165024..ed867a7 100644
--- a/IPython/core/magic.py
+++ b/IPython/core/magic.py
@@ -3753,13 +3753,12 @@ Defaulting color scheme to 'NoColor'"""
                 Whether to merge completion results into a single list
                 If False, only the completion results from the first non-empty completer
                 will be returned.
-	        IPCompleter.limit_to__all__=<Enum>
-    	        Current: 0
-                Choices: (0, 1)
+            IPCompleter.limit_to__all__=<CBool>
+                Current: False
                 Instruct the completer to use __all__ for the completion
                 Specifically, when completing on ``object.<tab>``.
-                When 1: only those names in obj.__all__ will be included.
-                When 0 [default]: the values in the __all__ attribute are ignored
+                When True: only those names in obj.__all__ will be included.
+                When False [default]: the __all__ attribute is ignored
             IPCompleter.greedy=<CBool>
                 Current: False
                 Activate greedy completion