diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index b6b7a26da..3eee559ee 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -738,6 +738,54 @@ function get_status_header_desc( $code ) {
 
 	$code = (int) $code;
 
+	if ( !isset($wp_header_to_desc) ) {
+		$wp_header_to_desc = array(
+			100 => 'Continue',
+			101 => 'Switching Protocols',
+
+			200 => 'OK',
+			201 => 'Created',
+			202 => 'Accepted',
+			203 => 'Non-Authoritative Information',
+			204 => 'No Content',
+			205 => 'Reset Content',
+			206 => 'Partial Content',
+
+			300 => 'Multiple Choices',
+			301 => 'Moved Permanently',
+			302 => 'Found',
+			303 => 'See Other',
+			304 => 'Not Modified',
+			305 => 'Use Proxy',
+			307 => 'Temporary Redirect',
+
+			400 => 'Bad Request',
+			401 => 'Unauthorized',
+			403 => 'Forbidden',
+			404 => 'Not Found',
+			405 => 'Method Not Allowed',
+			406 => 'Not Acceptable',
+			407 => 'Proxy Authentication Required',
+			408 => 'Request Timeout',
+			409 => 'Conflict',
+			410 => 'Gone',
+			411 => 'Length Required',
+			412 => 'Precondition Failed',
+			413 => 'Request Entity Too Large',
+			414 => 'Request-URI Too Long',
+			415 => 'Unsupported Media Type',
+			416 => 'Requested Range Not Satisfiable',
+			417 => 'Expectation Failed',
+
+			500 => 'Internal Server Error',
+			501 => 'Not Implemented',
+			502 => 'Bad Gateway',
+			503 => 'Service Unavailable',
+			504 => 'Gateway Timeout',
+			505 => 'HTTP Version Not Supported'
+		);
+	}
+
 	if ( isset( $wp_header_to_desc[$code] ) ) {
 		return $wp_header_to_desc[$code];
 	} else {
diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index 2b25c0e7c..e01feeae0 100644
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -44,50 +44,4 @@ $is_IE = ( $is_macIE || $is_winIE );
 $is_apache = ((strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false) || (strpos($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') !== false)) ? true : false;
 $is_IIS = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false) ? true : false;
 
-$wp_header_to_desc = array(
-	100 => 'Continue',
-	101 => 'Switching Protocols',
-
-	200 => 'OK',
-	201 => 'Created',
-	202 => 'Accepted',
-	203 => 'Non-Authoritative Information',
-	204 => 'No Content',
-	205 => 'Reset Content',
-	206 => 'Partial Content',
-
-	300 => 'Multiple Choices',
-	301 => 'Moved Permanently',
-	302 => 'Found',
-	303 => 'See Other',
-	304 => 'Not Modified',
-	305 => 'Use Proxy',
-	307 => 'Temporary Redirect',
-
-	400 => 'Bad Request',
-	401 => 'Unauthorized',
-	403 => 'Forbidden',
-	404 => 'Not Found',
-	405 => 'Method Not Allowed',
-	406 => 'Not Acceptable',
-	407 => 'Proxy Authentication Required',
-	408 => 'Request Timeout',
-	409 => 'Conflict',
-	410 => 'Gone',
-	411 => 'Length Required',
-	412 => 'Precondition Failed',
-	413 => 'Request Entity Too Large',
-	414 => 'Request-URI Too Long',
-	415 => 'Unsupported Media Type',
-	416 => 'Requested Range Not Satisfiable',
-	417 => 'Expectation Failed',
-
-	500 => 'Internal Server Error',
-	501 => 'Not Implemented',
-	502 => 'Bad Gateway',
-	503 => 'Service Unavailable',
-	504 => 'Gateway Timeout',
-	505 => 'HTTP Version Not Supported'
-);
-
 ?>
\ No newline at end of file