diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index 539f5515a2f8b..5056b5b82755c 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -652,7 +652,7 @@ def astype(self, dtype, copy=True):
         Create an Index with values cast to dtypes.
 
         The class of a new Index is determined by dtype. When conversion is
-        impossible, a ValueError exception is raised.
+        impossible, a TypeError exception is raised.
 
         Parameters
         ----------