diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index a7f2d4fad38de..c853a30c0de79 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -1920,7 +1920,7 @@ def notna(self):
 
         Returns
         -------
-        filled : %(klass)s
+        filled : Index
         """
 
     @Appender(_index_shared_docs['fillna'])