diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index 07b0f6a208..130b90e645 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -1888,6 +1888,7 @@ function check_theme_switched() {
 			/** This action is documented in wp-includes/theme.php */
 			do_action( 'after_switch_theme', $stylesheet );
 		}
+		flush_rewrite_rules();
 
 		update_option( 'theme_switched', false );
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 727d08c59d..19d1786912 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34027';
+$wp_version = '4.4-alpha-34028';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.