diff --git a/core/authentication/resources/classes/authentication.php b/core/authentication/resources/classes/authentication.php
index 2feab2a1e0..53a9f04f7f 100644
--- a/core/authentication/resources/classes/authentication.php
+++ b/core/authentication/resources/classes/authentication.php
@@ -463,7 +463,7 @@ class authentication {
 		//remote port number from the domain name
 		$domain_array = explode(":", $this->domain_name);
 		if (count($domain_array) > 1) {
-			$domain_name = $domain_array[0];
+			$this->domain_name = $domain_array[0];
 		}
 
 		//if the username