diff --git a/php/savesettings.php b/php/savesettings.php
index 151722f1..44da521d 100644
--- a/php/savesettings.php
+++ b/php/savesettings.php
@@ -1,7 +1,7 @@
 <?php
 
-function validIP($ip){
-	return filter_var($secondaryIP, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false;
+function validIP($address){
+	return filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false;
 }
 
 // Credit: http://stackoverflow.com/a/4694816/2087442