diff --git a/auth.php b/auth.php
index 20a43f3..9213929 100644
--- a/auth.php
+++ b/auth.php
@@ -13,6 +13,7 @@ class auth_plugin_authsplit extends DokuWiki_Auth_Plugin {
     protected $authplugins;
     protected $autocreate_users;
     protected $debug;
+    protected $use_fallback;
 
     /**
      * Show a debug message
@@ -39,7 +40,7 @@ public function __construct() {
         $this->loadConfig();
 
         /* Load all referenced auth plugins */
-        foreach (array('primary', 'secondary') as $type) {
+        foreach (array('primary', 'secondary', 'fallback') as $type) {
             $settingName = $type.'_authplugin';
             $pluginName = $this->getConf($settingName);
             if (!$pluginName) {
@@ -74,6 +75,14 @@ public function __construct() {
             $this->success = false;
             return;
         }
+        /* Use fallback auth methode? */
+        $this->use_fallback = $this->getConf('use_fallback', null);
+        if ($this->use_fallback === null) {
+            msg(sprintf($this->getLang('nocfg'), 'use_fallback'), -1);
+            $this->success = false;
+            return;
+        }
+        
 
         /* Of course, to modify login names actually BOTH auth plugins must
            support that. However, at this place we just consider the secondary
@@ -142,15 +151,36 @@ public function checkPass($user, $pass) {
                 'authsplit:checkPass(): primary auth plugin\'s checkPass() '.
                 'failed', -1, __LINE__, __FILE__
             );
-            return false;
+            
+            if ($this->use_fallback) {
+                $this->_debug(
+                    'authsplit:checkPass(): use fallback auth plugin\'s  '.
+                    'checkPass()', -1, __LINE__, __FILE__
+                );
+            
+                if (!$this->authplugins['fallback']->checkPass($user, $pass)) {
+                   $this->_debug(
+                    'authsplit:checkPass(): fallback auth plugin\'s checkPass() '.
+                    'failed', -1, __LINE__, __FILE__
+                    );
+            			    return false; 
+                } else {
+                    $this->_debug(
+                'authsplit:checkPass(): fallback auth plugin authenticated the '.
+                'user successfully.', 1, __LINE__, __FILE__
+           );
+                }
+            }
+        } else {
+            $this->_debug(
+                'authsplit:checkPass(): primary auth plugin authenticated the '.
+                'user successfully.', 1, __LINE__, __FILE__
+           );
         }
-        $this->_debug(
-            'authsplit:checkPass(): primary auth plugin authenticated the '.
-            'user successfully.', 1, __LINE__, __FILE__
-        );
 
         /* Then make sure that the secondary auth plugin also knows about the
            user. */
+                
         return $this->_checkUserOnSecondaryAuthPlugin($user);
     }
 
diff --git a/conf/default.php b/conf/default.php
index b98f12a..9ecdce9 100644
--- a/conf/default.php
+++ b/conf/default.php
@@ -9,3 +9,5 @@
 $conf['secondary_authplugin'] = 'authplain';
 $conf['autocreate_users']     = 0;
 $conf['debug']                = 0;
+$conf['use_fallback']         = 0;
+$conf['fallback_authplugin']  = 'authplain';
diff --git a/conf/metadata.php b/conf/metadata.php
index f04fee1..3c3cb2d 100644
--- a/conf/metadata.php
+++ b/conf/metadata.php
@@ -20,3 +20,5 @@ function initialize($default, $local, $protected) {
 $meta['secondary_authplugin'] = array('authtype_nosplit', '_cautionList' => array('plugin____authsplit____secondary_authplugin' => 'danger'));
 $meta['autocreate_users']     = array('onoff');
 $meta['debug']                = array('onoff');
+$meta['fallback_authplugin']  = array('authtype_nosplit', '_cautionList' => array('plugin____authsplit____secondary_authplugin' => 'danger'));
+$meta['use_fallback']         = array('onoff');