diff --git a/wp-includes/query.php b/wp-includes/query.php
index 9dc94273e4..6699997e94 100644
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -1418,7 +1418,7 @@ class WP_Query {
 				$this->is_author = true;
 			}
 
-			if ( ($this->is_date || $this->is_author || $this->is_category || $this->is_tag ) )
+			if ( ($this->is_date || $this->is_author || $this->is_category || $this->is_tag || $this->is_tax) )
 				$this->is_archive = true;
 		}