diff --git a/affiliates.php b/affiliates.php
index 2d0f3ea..d58c645 100644
--- a/affiliates.php
+++ b/affiliates.php
@@ -21,14 +21,14 @@
  * Plugin Name: Affiliates
  * Plugin URI: http://www.itthinx.com/plugins/affiliates
  * Description: The Affiliates plugin provides the right tools to maintain a partner referral program.
- * Version: 2.13.0
+ * Version: 2.13.1
  * Author: itthinx
  * Author URI: http://www.itthinx.com
  * Donate-Link: http://www.itthinx.com
  * License: GPLv3
  */
 if ( !defined( 'AFFILIATES_CORE_VERSION' ) ) {
-	define( 'AFFILIATES_CORE_VERSION', '2.13.0' );
+	define( 'AFFILIATES_CORE_VERSION', '2.13.1' );
 	define( 'AFFILIATES_PLUGIN_NAME', 'affiliates' );
 	define( 'AFFILIATES_FILE', __FILE__ );
 	define( 'AFFILIATES_PLUGIN_BASENAME', plugin_basename( AFFILIATES_FILE ) );
diff --git a/lib/core/wp-init.php b/lib/core/wp-init.php
index 06b8287..1217c1d 100644
--- a/lib/core/wp-init.php
+++ b/lib/core/wp-init.php
@@ -1974,9 +1974,6 @@ function affiliates_get_affiliate_url( $url, $affiliate_id ) {
 			$components['path'] = '/';
 		}
 		$components['query'] = $query;
-		if ( !empty( $components['query'] ) ) {
-			$components['path'] = rtrim( $components['path'], '/' );
-		}
 	}
 	return affiliates_compose_url( $components );
 }
diff --git a/readme.txt b/readme.txt
index e95e89d..d22da4a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Donate link: http://www.itthinx.com/plugins/affiliates
 Tags: ads, AddToAny, AddThis, advertising, affiliate, affiliate marketing, affiliate plugin, affiliate tool, affiliates, contact form, contact form 7, downloads, e-commerce, Ecwid, Events Manager, Jigoshop, lead, link, marketing, money, partner, Pay per Click, PayPal, PPC, referral, referral links, referrer, sales, shopping cart, TheCartPress, track, transaction, WooCommerce, WP e-Commerce
 Requires at least: 4.0.0
 Tested up to: 4.3.1
-Stable tag: 2.13.0
+Stable tag: 2.13.1
 License: GPLv3
 
 The Affiliates system provides powerful tools to maintain an Affiliate Marketing Program.
@@ -340,6 +340,9 @@ See [Affiliates Screenshots](http://www.itthinx.com/plugins/affiliates/affiliate
 
 == Changelog ==
 
+= 2.13.1 =
+* Reverted a change introduced in 2.13.0 related to trailing slashes.
+
 = 2.13.0 =
 * Fixed an issue where trailing slashes would be left before the query part of an affiliate URL.
 * Add-ons section revised.
@@ -667,5 +670,6 @@ See [Affiliates Screenshots](http://www.itthinx.com/plugins/affiliates/affiliate
 
 == Upgrade Notice ==
 
-= 2.13.0 =
-This release fixes an issue where trailing slashes would be left before the query part of an affiliate URL and has a revised section for recommended add-ons.
+= 2.13.1 =
+This release reverts a change introduced in 2.13.0 related to trailing slashes before the query part of an affiliate URL.
+The change could affect valid URLs and has been removed in this version.