diff --git a/plugins/telegraf_pfinterface.php b/plugins/telegraf_pfinterface.php
index 1e44c73..ebebc72 100755
--- a/plugins/telegraf_pfinterface.php
+++ b/plugins/telegraf_pfinterface.php
@@ -20,10 +20,10 @@ foreach ($iflist as $ifname => $friendly) {
         $mac = get_interface_mac($realif);
 
         if (!isset($ipaddr)){
-                $ipaddr = 'Unassigned'
+                $ipaddr = "Unassigned";
         }
         if (!isset($mac)){
-                $mac = 'Unavailable'
+                $mac = "Unavailable";
         }
         if (strtolower($ifstatus) == "up"){
                 $ifstatus = 1;
@@ -51,4 +51,4 @@ foreach ($iflist as $ifname => $friendly) {
                 $ifstatus
                 );
 }
-?>
\ No newline at end of file
+?>