diff --git a/phpseclib/Crypt/Hash.php b/phpseclib/Crypt/Hash.php
index c7503ecb..5e9c55e4 100644
--- a/phpseclib/Crypt/Hash.php
+++ b/phpseclib/Crypt/Hash.php
@@ -183,6 +183,7 @@ class Crypt_Hash {
      */
     function setHash($hash)
     {
+        $hash = strtolower($hash);
         switch ($hash) {
             case 'md5-96':
             case 'sha1-96':