diff --git a/Doc/library/hashlib.rst b/Doc/library/hashlib.rst
index 661338e0e14..cc982f63182 100644
--- a/Doc/library/hashlib.rst
+++ b/Doc/library/hashlib.rst
@@ -182,7 +182,7 @@ Key Derivation Function
 Key derivation and key stretching algorithms are designed for secure password
 hashing. Naive algorithms such as ``sha1(password)`` are not resistant against
 brute-force attacks. A good password hashing function must be tunable, slow, and
-include a salt.
+include a `salt <https://en.wikipedia.org/wiki/Salt_%28cryptography%29>`_.
 
 
 .. function:: pbkdf2_hmac(name, password, salt, rounds, dklen=None)