diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 729c1c8120..09cb5b365f 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -184,7 +184,7 @@ function make_jumpbox($action, $forum_id = false)
 {
 	global $auth, $template, $user, $db, $nav_links, $phpEx;
 
-	$boxstring = '<select name="f" onChange="if(this.options[this.selectedIndex].value != -1){ forms[\'jumpbox\'].submit() }"><option value="-1">' . $user->lang['Select_forum'] . '</option><option value="-1">-----------------</option>';
+	$boxstring = '<input type="hidden" name="sid" value="' . $user->session_id . '" /><select name="f" onChange="if(this.options[this.selectedIndex].value != -1){ forms[\'jumpbox\'].submit() }"><option value="-1">' . $user->lang['Select_forum'] . '</option><option value="-1">-----------------</option>';
 
 	$sql = 'SELECT forum_id, forum_name, forum_postable, left_id, right_id
 		FROM ' . FORUMS_TABLE . '
@@ -248,6 +248,7 @@ function make_jumpbox($action, $forum_id = false)
 	{
 		$boxstring .= '<option value="-1">' . $user->lang['No_forums'] . '</option>';
 	}
+
 	$boxstring .= '</select>';
 
 	$template->assign_vars(array(
diff --git a/phpBB/includes/page_header.php b/phpBB/includes/page_header.php
index 00a1a168b3..6e5a14fcc2 100644
--- a/phpBB/includes/page_header.php
+++ b/phpBB/includes/page_header.php
@@ -65,7 +65,7 @@ $prev_user_ip = '';
 $reading_sql = '';
 if (!empty($_REQUEST['f']))
 {
-	$reading_sql = 'AND s.session_page LIKE \'%f=' . intval($_GET['f'])) . '%\'';
+	$reading_sql = 'AND s.session_page LIKE \'%f=' . intval($_REQUEST['f']) . '%\'';
 }
 
 $sql = "SELECT u.username, u.user_id, u.user_allow_viewonline, u.user_colour, s.session_ip
@@ -125,7 +125,7 @@ if (empty($online_userlist))
 	$online_userlist = $user->lang['None'];
 }
 
-if (empty($_GET['f']))
+if (empty($_REQUEST['f']))
 {
 	$online_userlist = $user->lang['Registered_users'] . ' ' . $online_userlist;
 }