diff --git a/src/Csrf.php b/src/Csrf.php
index 188ae22..c59839c 100644
--- a/src/Csrf.php
+++ b/src/Csrf.php
@@ -258,7 +258,7 @@ public static function getTokens()
 		// the cookies "stick"
 		$secret = static::getSecret();
 		if (!$hasCookies && $secret) {
-			$ip = ';ip:' . static::hash($_SERVER['IP_ADDRESS']);
+			$ip = ';ip:' . static::hash($_SERVER['REMOTE_ADDR']);
 		} else {
 			$ip = '';
 		}