diff --git a/src/wp-includes/query.php b/src/wp-includes/query.php
index e38b372e00..b60e37fd79 100644
--- a/src/wp-includes/query.php
+++ b/src/wp-includes/query.php
@@ -1827,7 +1827,7 @@ class WP_Query {
 	 *
 	 * @param array &$q The query variables
 	 */
-	function parse_tax_query( &$q ) {
+	public function parse_tax_query( &$q ) {
 		if ( ! empty( $q['tax_query'] ) && is_array( $q['tax_query'] ) ) {
 			$tax_query = $q['tax_query'];
 		} else {