Index: src/wp-includes/class-wp-term-query.php
===================================================================
--- src/wp-includes/class-wp-term-query.php	(revision 49042)
+++ src/wp-includes/class-wp-term-query.php	(working copy)
@@ -422,14 +422,10 @@
 		$exclude_tree = $args['exclude_tree'];
 		$include      = $args['include'];
 
-		$inclusions = '';
 		if ( ! empty( $include ) ) {
 			$exclude      = '';
 			$exclude_tree = '';
 			$inclusions   = implode( ',', wp_parse_id_list( $include ) );
-		}
-
-		if ( ! empty( $inclusions ) ) {
 			$this->sql_clauses['where']['inclusions'] = 't.term_id IN ( ' . $inclusions . ' )';
 		}