diff --git src/wp-includes/class-wp-site-query.php src/wp-includes/class-wp-site-query.php
index 1836ab1..3952901 100644
--- src/wp-includes/class-wp-site-query.php
+++ src/wp-includes/class-wp-site-query.php
@@ -518,7 +518,7 @@
 
 		$where = implode( ' AND ', $this->sql_clauses['where'] );
 
-		$pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' );
+		$pieces = array( 'fields', 'where', 'orderby', 'limits', 'groupby' );
 
 		/**
 		 * Filters the site query clauses.