diff --git a/php.ini-development b/php.ini-development
index 56dbf86ac9b..cb994bdf116 100644
--- a/php.ini-development
+++ b/php.ini-development
@@ -1614,6 +1614,9 @@ session.use_trans_sid = 0
 ; Possible Values
 ;   0  (MD5 128 bits)
 ;   1  (SHA-1 160 bits)
+; This option may also be set to the name of any hash function supported by
+; the hash extension. A list of available hashes is returned by the hash_alogs()
+; function.
 ; http://php.net/session.hash-function
 session.hash_function = 0
 
diff --git a/php.ini-production b/php.ini-production
index 35bd9b31d2b..3ef0957d75e 100644
--- a/php.ini-production
+++ b/php.ini-production
@@ -1622,6 +1622,9 @@ session.use_trans_sid = 0
 ; Possible Values
 ;   0  (MD5 128 bits)
 ;   1  (SHA-1 160 bits)
+; This option may also be set to the name of any hash function supported by
+; the hash extension. A list of available hashes is returned by the hash_alogs()
+; function.
 ; http://php.net/session.hash-function
 session.hash_function = 0