diff --git a/system/libraries/Session/drivers/Session_native.php b/system/libraries/Session/drivers/Session_native.php
index fb5ce190637..408e17ee554 100644
--- a/system/libraries/Session/drivers/Session_native.php
+++ b/system/libraries/Session/drivers/Session_native.php
@@ -109,7 +109,9 @@ protected function initialize()
 		session_set_cookie_params($config['sess_expire_on_close'] ? 0 : $expire, $path, $domain, $secure, $http_only);
 
 		// Start session
-		session_start();
+		if ('' == session_id()) {
+			session_start();
+		}
 
 		// Check session expiration, ip, and agent
 		$now = time();
@@ -239,4 +241,4 @@ public function &get_userdata()
 }
 
 /* End of file Session_native.php */
-/* Location: ./system/libraries/Session/drivers/Session_native.php */
\ No newline at end of file
+/* Location: ./system/libraries/Session/drivers/Session_native.php */