diff --git a/wp-admin/load-scripts.php b/wp-admin/load-scripts.php
index 552d310791..8cdb9f7ee0 100644
--- a/wp-admin/load-scripts.php
+++ b/wp-admin/load-scripts.php
@@ -125,7 +125,7 @@ require(ABSPATH . WPINC . '/version.php');
 
 $compress = ( isset($_GET['c']) && $_GET['c'] );
 $force_gzip = ( $compress && 'gzip' == $_GET['c'] );
-$expires_offset = YEAR_IN_SECONDS;
+$expires_offset = 31536000;
 $out = '';
 
 $wp_scripts = new WP_Scripts();
diff --git a/wp-admin/load-styles.php b/wp-admin/load-styles.php
index 9cb366045e..bdacc21ce3 100644
--- a/wp-admin/load-styles.php
+++ b/wp-admin/load-styles.php
@@ -104,7 +104,7 @@ if ( empty($load) )
 $compress = ( isset($_GET['c']) && $_GET['c'] );
 $force_gzip = ( $compress && 'gzip' == $_GET['c'] );
 $rtl = ( isset($_GET['dir']) && 'rtl' == $_GET['dir'] );
-$expires_offset = YEAR_IN_SECONDS;
+$expires_offset = 31536000;
 $out = '';
 
 $wp_styles = new WP_Styles();
diff --git a/wp-includes/js/tinymce/wp-tinymce.php b/wp-includes/js/tinymce/wp-tinymce.php
index e564cd2ebc..449f0e25f9 100644
--- a/wp-includes/js/tinymce/wp-tinymce.php
+++ b/wp-includes/js/tinymce/wp-tinymce.php
@@ -19,7 +19,7 @@ function get_file($path) {
 	return @file_get_contents($path);
 }
 
-$expires_offset = YEAR_IN_SECONDS;
+$expires_offset = 31536000;
 
 header('Content-Type: application/x-javascript; charset=UTF-8');
 header('Vary: Accept-Encoding'); // Handle proxies