diff --git a/phpseclib/Crypt/DES.php b/phpseclib/Crypt/DES.php
index 2fd7a9b8..f6c1f301 100644
--- a/phpseclib/Crypt/DES.php
+++ b/phpseclib/Crypt/DES.php
@@ -291,7 +291,7 @@ class Crypt_DES {
      * @return Crypt_DES
      * @access public
      */
-    function Crypt_DES($mode = CRYPT_MODE_DES_CBC)
+    function Crypt_DES($mode = CRYPT_DES_MODE_CBC)
     {
         if ( !defined('CRYPT_DES_MODE') ) {
             switch (true) {
@@ -1292,4 +1292,4 @@ class Crypt_DES {
 }
 
 // vim: ts=4:sw=4:et:
-// vim6: fdl=1:
+// vim6: fdl=1:
\ No newline at end of file