diff --git a/README.md b/README.md
index 420fe577..2aa75b9c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ MIT-licensed pure-PHP implementations of an arbitrary-precision integer
 arithmetic library, fully PKCS#1 (v2.1) compliant RSA, DES, 3DES, RC4, Rijndael,
 AES, Blowfish, Twofish, SSH-1, SSH-2, SFTP, and X.509
 
-* [Download (0.3.5)](http://sourceforge.net/projects/phpseclib/files/phpseclib0.3.5.zip/download)
+* [Download (0.3.6)](http://sourceforge.net/projects/phpseclib/files/phpseclib0.3.6.zip/download)
 * [Browse Git](https://github.com/phpseclib/phpseclib)
 * [Documentation](http://phpseclib.sourceforge.net/)
 * [Support](http://www.frostjedi.com/phpbb/viewforum.php?f=46)
diff --git a/composer.json b/composer.json
index e416a013..0b0789f9 100644
--- a/composer.json
+++ b/composer.json
@@ -61,7 +61,8 @@
             "Crypt": "phpseclib/",
             "File": "phpseclib/",
             "Math": "phpseclib/",
-            "Net": "phpseclib/"
+            "Net": "phpseclib/",
+            "System": "phpseclib/"
         },
         "files": [
             "phpseclib/Crypt/Random.php"
diff --git a/phpseclib/System/SSH_Agent.php b/phpseclib/System/SSH_Agent.php
index 32392a55..2d4c3629 100644
--- a/phpseclib/System/SSH_Agent.php
+++ b/phpseclib/System/SSH_Agent.php
@@ -227,14 +227,6 @@ class System_SSH_Agent
      */
     var $fsock;
 
-    /**
-     * Is Connected?
-     *
-     * @var Boolean
-     * @access private
-     */
-    var $is_connected = false;
-
     /**
      * Default Constructor
      *
@@ -251,7 +243,7 @@ class System_SSH_Agent
                 $address = $_ENV['SSH_AUTH_SOCK'];
                 break;
             default:
-                user_error('SSH_AUTH_SOCK not found', E_USER_NOTICE);
+                user_error('SSH_AUTH_SOCK not found');
                 return false;
         }
 
@@ -259,7 +251,6 @@ class System_SSH_Agent
         if (!$this->fsock) {
             user_error("Unable to connect to ssh-agent (Error $errno: $errstr)");
         }
-        $this->is_connected = true;
     }
 
     /**
@@ -273,7 +264,7 @@ class System_SSH_Agent
      */
     function requestIdentities()
     {
-        if (!$this->is_connected) {
+        if (!$this->fsock) {
             return array();
         }