diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index d408142750..98d258bc0e 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -676,6 +676,7 @@ function sanitize_title_with_dashes($title) {
 
 	$title = strtolower($title);
 	$title = preg_replace('/&.+?;/', '', $title); // kill entities
+	$title = str_replace('.', '-', $title);
 	$title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
 	$title = preg_replace('/\s+/', '-', $title);
 	$title = preg_replace('|-+|', '-', $title);