diff --git a/pandas/io/pickle.py b/pandas/io/pickle.py
index 756096dd0c9ce..51c36520555a4 100644
--- a/pandas/io/pickle.py
+++ b/pandas/io/pickle.py
@@ -29,8 +29,8 @@ def to_pickle(obj, path, compression='infer', protocol=pkl.HIGHEST_PROTOCOL):
         For Python >= 3.4, 4 is a valid value. A negative value for the
         protocol parameter is equivalent to setting its value to
         HIGHEST_PROTOCOL.
-
-        .. [1] https://docs.python.org/3/library/pickle.html
+        
+        .. [1] https://docs.python.org/3.1/library/pickle.html
         .. versionadded:: 0.21.0
 
 
@@ -48,7 +48,6 @@ def to_pickle(obj, path, compression='infer', protocol=pkl.HIGHEST_PROTOCOL):
         for _f in fh:
             _f.close()
 
-
 def read_pickle(path, compression='infer'):
     """
     Load pickled pandas object (or any other pickled object) from the specified