diff --git a/wp-includes/l10n.php b/wp-includes/l10n.php
index 1938471568..8baa2ab521 100644
--- a/wp-includes/l10n.php
+++ b/wp-includes/l10n.php
@@ -511,8 +511,9 @@ function get_available_languages( $dir = null ) {
 	$languages = array();
 
 	foreach( (array)glob( ( is_null( $dir) ? WP_LANG_DIR : $dir ) . '/*.mo' ) as $lang_file ) {
-		if ( false === strpos( $lang_file, 'continents-cities' ) && false === strpos( $lang_file, 'ms-' ) )
-			$languages[] = basename($lang_file, '.mo');
+		$lang_file = basename($lang_file, '.mo');
+		if ( 0 !== strpos( $lang_file, 'continents-cities' ) && 0 !== strpos( $lang_file, 'ms-' ) )
+			$languages[] = $lang_file;
 	}
 
 	return $languages;