diff --git a/phpBB/posting.php b/phpBB/posting.php
index 7368026136..d05abc6a0e 100644
--- a/phpBB/posting.php
+++ b/phpBB/posting.php
@@ -1360,8 +1360,8 @@ $lock_post_checked	= (isset($post_lock)) ? $post_lock : $post_data['post_edit_lo
 $notify_set			= ($mode != 'edit' && $config['allow_topic_notify'] && $user->data['is_registered'] && !$post_data['notify_set']) ? $user->data['user_notify'] : $post_data['notify_set'];
 $notify_checked		= (isset($notify)) ? $notify : (($mode == 'post') ? $user->data['user_notify'] : $notify_set);
 
-// Page title & action URL, include session_id for security purpose
-$s_action = append_sid("{$phpbb_root_path}posting.$phpEx", "mode=$mode&f=$forum_id", true, $user->session_id);
+// Page title & action URL
+$s_action = append_sid("{$phpbb_root_path}posting.$phpEx", "mode=$mode&f=$forum_id");
 $s_action .= ($topic_id) ? "&t=$topic_id" : '';
 $s_action .= ($post_id) ? "&p=$post_id" : '';