diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 2efef24c1e..07bc8d23d9 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -1368,7 +1368,7 @@ function remove_accents( $string ) {
  */
 function sanitize_file_name( $filename ) {
 	$filename_raw = $filename;
-	$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));
+	$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", "%", "+", chr(0));
 	/**
 	 * Filter the list of characters to remove from a filename.
 	 *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 48f589264c..461c7b46c4 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-35121';
+$wp_version = '4.4-alpha-35122';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.