diff --git a/includes/polling/port-etherlike.inc.php b/includes/polling/port-etherlike.inc.php
index a515c48ec..77cdac0cb 100755
--- a/includes/polling/port-etherlike.inc.php
+++ b/includes/polling/port-etherlike.inc.php
@@ -1,6 +1,7 @@
 <?php
 
-    if($port_stats[$device[device_id]][$port[ifIndex]] && $port['ifType'] == "ethernetCsmacd") { // Check to make sure Port data is cached.
+    if($port_stats[$device[device_id]][$port[ifIndex]] && $port['ifType'] == "ethernetCsmacd" 
+       && isset($port_stats[$device[device_id]][$port[ifIndex]]['dot3StatsIndex'])) { // Check to make sure Port data is cached.
 
       $this_port = &$port_stats[$device[device_id]][$port[ifIndex]];