diff --git a/usr/local/www/diag_states_summary.php b/usr/local/www/diag_states_summary.php
index 3bd554e6ac..c67b6680e3 100644
--- a/usr/local/www/diag_states_summary.php
+++ b/usr/local/www/diag_states_summary.php
@@ -118,7 +118,7 @@ function sort_by_ip($a, $b) {
 }
 
 function build_port_info($portarr, $proto) {
-	if (!portarr)
+	if (!$portarr)
 		return '';
 	$ports = array();
 	asort($portarr);