diff --git a/src/wp-includes/class-wp-matchesmapregex.php b/src/wp-includes/class-wp-matchesmapregex.php
index 558bd98667..ddca4f2cb2 100644
--- a/src/wp-includes/class-wp-matchesmapregex.php
+++ b/src/wp-includes/class-wp-matchesmapregex.php
@@ -63,8 +63,8 @@ class WP_MatchesMapRegex {
 	 * @return string
 	 */
 	public static function apply( $subject, $matches ) {
-		$oSelf = new WP_MatchesMapRegex( $subject, $matches );
-		return $oSelf->output;
+		$result = new WP_MatchesMapRegex( $subject, $matches );
+		return $result->output;
 	}
 
 	/**