diff --git a/ChangeLog b/ChangeLog
index ee53f0f67a..af38567b74 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun May 22 07:54:16 2011  Martin Bosslet  <Martin.Bosslet@googlemail.com>
+
+	* ext/openssl/ossl_digest.c: Explain DSS and DSS1 in documentation.
+
 Sun May 22 07:10:25 2011  Martin Bosslet  <Martin.Bosslet@googlemail.com>
 
 	* test/openssl/test_pkey_dsa.rb: Add tests for sign/verify.
diff --git a/ext/openssl/ossl_digest.c b/ext/openssl/ossl_digest.c
index c1678339da..346b6cfe14 100644
--- a/ext/openssl/ossl_digest.c
+++ b/ext/openssl/ossl_digest.c
@@ -318,10 +318,11 @@ Init_ossl_digest()
      * and verify that it is equal to that in the signature.
      *
      * Among the supported message digest algorithms are:
-     * * DSS, DSS1
+     * * SHA, SHA1, SHA224, SHA256, SHA384 and SHA512
      * * MD2, MD4, MDC2 and MD5
      * * RIPEMD160
-     * * SHA, SHA1, SHA224, SHA256, SHA384 and SHA512
+     * * DSS, DSS1 (Pseudo algorithms to be used for DSA signatures. DSS is
+     *   equal to SHA and DSS1 is equal to SHA1)
      *
      * For each of these algorithms, there is a sub-class of Digest that
      * can be instantiated as simply as e.g.