diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index de6f1e806..26b81585a 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -288,6 +288,17 @@ function remove_accents($string) {
 	return $string;
 }
 
+function sanitize_file_name( $name ) { // Like sanitize_title, but with periods
+	$name = strtolower( $name );
+	$name = preg_replace('/&.+?;/', '', $name); // kill entities
+	$name = str_replace( '_', '-', $name );
+	$name = preg_replace('/[^a-z0-9\s-.]/', '', $name);
+	$name = preg_replace('/\s+/', '-', $name);
+	$name = preg_replace('|-+|', '-', $name);
+	$name = trim($name, '-');
+	return $name;
+}
+
 function sanitize_user( $username, $strict = false ) {
 	$raw_username = $username;
 	$username = strip_tags($username);
diff --git a/xmlrpc.php b/xmlrpc.php
index cf3129230..ee05245dd 100644
--- a/xmlrpc.php
+++ b/xmlrpc.php
@@ -836,7 +836,7 @@ class wp_xmlrpc_server extends IXR_Server {
 		$user_pass   = $wpdb->escape($args[2]);
 		$data        = $args[3];
 
-		$name = sanitize_file( $data['name'] );
+		$name = sanitize_file_name( $data['name'] );
 		$type = $data['type'];
 		$bits = $data['bits'];
 
@@ -1312,4 +1312,4 @@ class wp_xmlrpc_server extends IXR_Server {
 
 $wp_xmlrpc_server = new wp_xmlrpc_server();
 
-?>
\ No newline at end of file
+?>