diff --git a/wp-includes/classes.php b/wp-includes/classes.php
index 0f99d52e7a..1872e1d380 100644
--- a/wp-includes/classes.php
+++ b/wp-includes/classes.php
@@ -1609,6 +1609,7 @@ class WP {
 			nocache_headers();
 		if ( !empty($this->query_vars['error']) && '404' == $this->query_vars['error'] ) {
 			status_header( 404 );
+			@header('Content-type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
 		} else if ( empty($this->query_vars['feed']) ) {
 			@header('Content-type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
 		} else {