diff --git a/wp-admin/gears-manifest.php b/wp-admin/gears-manifest.php
index 6d035ca464..6258f73c06 100644
--- a/wp-admin/gears-manifest.php
+++ b/wp-admin/gears-manifest.php
@@ -7,8 +7,8 @@
  */
 
 /** Set ABSPATH for execution */
-define( 'ABSPATH', dirname(dirname(__FILE__)) );
-define( 'WPINC', '/wp-includes' );
+define( 'ABSPATH', dirname(dirname(__FILE__)) . '/' );
+define( 'WPINC', 'wp-includes' );
 
 /**
  * @ignore
diff --git a/wp-admin/load-scripts.php b/wp-admin/load-scripts.php
index ebb8894267..24a8b62500 100644
--- a/wp-admin/load-scripts.php
+++ b/wp-admin/load-scripts.php
@@ -1,8 +1,8 @@
 <?php
 
 /** Set ABSPATH for execution */
-define( 'ABSPATH', dirname(dirname(__FILE__)) );
-define( 'WPINC', '/wp-includes' );
+define( 'ABSPATH', dirname(dirname(__FILE__)) . '/' );
+define( 'WPINC', 'wp-includes' );
 
 /**
  * @ignore
@@ -97,8 +97,8 @@ $load = explode(',', $load);
 if ( empty($load) )
 	exit;
 
-require(ABSPATH . '/wp-includes/script-loader.php');
-require(ABSPATH . '/wp-includes/version.php');
+require(ABSPATH . WPINC . '/script-loader.php');
+require(ABSPATH . WPINC . '/version.php');
 
 $compress = ( isset($_GET['c']) && $_GET['c'] );
 $force_gzip = ( $compress && 'gzip' == $_GET['c'] );
diff --git a/wp-admin/load-styles.php b/wp-admin/load-styles.php
index e827c99719..bdd1e78dab 100644
--- a/wp-admin/load-styles.php
+++ b/wp-admin/load-styles.php
@@ -1,8 +1,8 @@
 <?php
 
 /** Set ABSPATH for execution */
-define( 'ABSPATH', dirname(dirname(__FILE__)) );
-define( 'WPINC', '/wp-includes' );
+define( 'ABSPATH', dirname(dirname(__FILE__)) . '/' );
+define( 'WPINC', 'wp-includes' );
 
 /**
  * @ignore