diff --git a/includes/definitions.inc.php b/includes/definitions.inc.php
index 0d3ffc2e2..7b874be86 100644
--- a/includes/definitions.inc.php
+++ b/includes/definitions.inc.php
@@ -316,6 +316,7 @@ $os = 'calix';
 $config['os'][$os]['text']             = 'Calix E7';
 $config['os'][$os]['type']             = 'network';
 $config['os'][$os]['ifname']           = 1;
+$config['os'][$os]['empty_ifdescr']    = 1;
 $config['os'][$os]['icon']             = 'calix';
 $config['os'][$os]['over'][0]['graph'] = 'device_bits';
 $config['os'][$os]['over'][0]['text']  = 'Device Traffic';
diff --git a/includes/functions.php b/includes/functions.php
index 883bccc65..f5949aae3 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -895,7 +895,7 @@ function is_port_valid($port, $device) {
                 }
             }
         }
-        if (empty($port['ifDescr']) && !$device['os'] == "calix") {
+        if (empty($port['ifDescr']) && !$config['os'][$device['os']]['empty_ifdescr']) {
             $valid = 0;
         }
         if ($device['os'] == "catos" && strstr($if, "vlan")) {