diff --git a/packages/zend-session/library/Zend/Session/Exception.php b/packages/zend-session/library/Zend/Session/Exception.php
index 4aeaadae1..8fea2eaac 100644
--- a/packages/zend-session/library/Zend/Session/Exception.php
+++ b/packages/zend-session/library/Zend/Session/Exception.php
@@ -53,7 +53,7 @@ class Zend_Session_Exception extends Zend_Exception
      * @param  string $errstr
      * @return void
      */
-    static public function handleSessionStartError($errno, $errstr, $errfile, $errline, $errcontext)
+    static public function handleSessionStartError($errno, $errstr, $errfile, $errline, $errcontext = null)
     {
         self::$sessionStartError = $errfile . '(Line:' . $errline . '): Error #' . $errno . ' ' . $errstr;
     }
@@ -66,7 +66,7 @@ static public function handleSessionStartError($errno, $errstr, $errfile, $errli
      * @param  string $errstr
      * @return void
      */
-    static public function handleSilentWriteClose($errno, $errstr, $errfile, $errline, $errcontext)
+    static public function handleSilentWriteClose($errno, $errstr, $errfile, $errline, $errcontext = null)
     {
         self::$sessionStartError .= PHP_EOL . $errfile . '(Line:' . $errline . '): Error #' . $errno . ' ' . $errstr;
     }