diff --git a/Lib/hashlib.py b/Lib/hashlib.py
index f7c0211..13124e2 100644
--- a/Lib/hashlib.py
+++ b/Lib/hashlib.py
@@ -18,6 +18,9 @@
 More algorithms may be available on your platform but the above are
 guaranteed to exist.
 
+NOTE: If you want the adler32 or crc32 hash functions they are available in
+the zlib module.
+
 Choose your hash function wisely.  Some have known collision weaknesses.
 sha384 and sha512 will be slow on 32 bit platforms.