diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index f6b119c..6ce32a7 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -937,8 +937,8 @@ class IPCompleter(Completer):
         def get_keys(obj):
             # Objects can define their own completions by defining an
             # _ipy_key_completions_() method.
-            if _safe_really_hasattr(obj, '_ipy_key_completions_'):
-                return obj._ipy_key_completions_()
+            if _safe_really_hasattr(obj, '_ipython_key_completions_'):
+                return obj._ipython_key_completions_()
 
             # Special case some common in-memory dict-like types
             if isinstance(obj, dict) or\
diff --git a/IPython/core/tests/test_completer.py b/IPython/core/tests/test_completer.py
index 5ab36bb..8d6f4f0 100644
--- a/IPython/core/tests/test_completer.py
+++ b/IPython/core/tests/test_completer.py
@@ -765,7 +765,7 @@ class KeyCompletable(object):
     def __init__(self, things=()):
         self.things = things
 
-    def _ipy_key_completions_(self):
+    def _ipython_key_completions_(self):
         return list(self.things)
 
 def test_object_key_completion():