diff --git a/jigsaw-permalinks.php b/jigsaw-permalinks.php
index e1c5487..fe2e9a4 100644
--- a/jigsaw-permalinks.php
+++ b/jigsaw-permalinks.php
@@ -4,8 +4,10 @@ class JigsawPermalinks {
 
 	public static function set_author_base( $base, $with_front = true ) {
 		global $wp_rewrite;
-		$wp_rewrite->author_base = $base;
-		if ( !$with_front ) {
+		if ( $wp_rewrite ) {
+			$wp_rewrite->author_base = $base;
+		}
+		if ( !$with_front && $wp_rewrite ) {
 			$wp_rewrite->author_structure = '/' . $wp_rewrite->author_base. '/%author%';
 		}
 	}
diff --git a/jigsaw.php b/jigsaw.php
index b9f0b8c..69e894b 100644
--- a/jigsaw.php
+++ b/jigsaw.php
@@ -4,7 +4,7 @@
 	Plugin Name: Jigsaw
 	Description: Simple ways to make admin customizations for WordPress
 	Author: Jared Novack + Upstatement
-	Version: 0.5
+	Version: 0.5.1
 	Author URI: http://jigsaw.upstatement.com/
 	*/
 
diff --git a/readme.txt b/readme.txt
index 82bb3cb..8bfa7ca 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 Contributors: jarednova
 Tags: admin, configuration
 Requires at least: 3.7
-Stable tag: 0.5
+Stable tag: 0.5.1
 Tested up to: 4.0
 PHP version: 5.3.0 or greater
 License: GPLv2 or later