diff --git a/includes/html/print-map.inc.php b/includes/html/print-map.inc.php
index f335cf82c0..fa93ce5896 100644
--- a/includes/html/print-map.inc.php
+++ b/includes/html/print-map.inc.php
@@ -270,8 +270,8 @@ foreach ($list as $items) {
     } else {
         $width = round(0.77 * pow($speed, 0.25));
     }
-    $link_in_used = ($items['local_ifinoctets_rate'] * 8) / $items['local_ifspeed'] * 100;
-    $link_out_used = ($items['local_ifoutoctets_rate'] * 8) / $items['local_ifspeed'] * 100;
+    $link_in_used = $items['local_ifspeed'] ? (($items['local_ifinoctets_rate'] * 8) / $items['local_ifspeed'] * 100) : 0;
+    $link_out_used = $items['local_ifspeed'] ? (($items['local_ifoutoctets_rate'] * 8) / $items['local_ifspeed'] * 100) : 0;
     if ($link_in_used > $link_out_used) {
         $link_used = $link_in_used;
     } else {
diff --git a/includes/html/table/ports.inc.php b/includes/html/table/ports.inc.php
index 3d4fc858ec..eaaee25831 100644
--- a/includes/html/table/ports.inc.php
+++ b/includes/html/table/ports.inc.php
@@ -190,8 +190,8 @@ foreach (dbFetchRows($query, $param) as $port) {
         'ifOutOctets_rate' => $port['ifOutOctets_rate'] * 8,
         'ifInUcastPkts_rate' => $port['ifInUcastPkts_rate'],
         'ifOutUcastPkts_rate' => $port['ifOutUcastPkts_rate'],
-        'ifInErrors' => \LibreNMS\Util\Number::formatSi($port['ifInErrors_delta'] / $port['poll_period'], 2, 3, 'EPS'),
-        'ifOutErrors' => \LibreNMS\Util\Number::formatSi($port['ifOutErrors_delta'] / $port['poll_period'], 2, 3, 'EPS'),
+        'ifInErrors' => $port['poll_period'] ? \LibreNMS\Util\Number::formatSi($port['ifInErrors_delta'] / $port['poll_period'], 2, 3, 'EPS') : '',
+        'ifOutErrors' => $port['poll_period'] ? \LibreNMS\Util\Number::formatSi($port['ifOutErrors_delta'] / $port['poll_period'], 2, 3, 'EPS') : '',
         'ifType' => \LibreNMS\Util\Rewrite::normalizeIfType($port['ifType']),
         'ifAlias' => $port['ifAlias'],
         'actions' => $actions,