diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 8aa5f58f7b..c88e982413 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -3109,10 +3109,14 @@ function wp_timezone_choice($selectedzone) {
$structure = '';
$pad = ' ';
+ $continents = array('Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific', 'Etc');
+
if ( empty($selectedzone) )
$structure .= '\n";
foreach ( $zonen as $zone ) {
extract($zone);
+ if ( ! in_array($continent, $continents) )
+ continue;
if ( empty($selectcontinent) && !empty($city) ) {
$selectcontinent = $continent;
$structure .= '