diff --git a/html/includes/print-interface.inc.php b/html/includes/print-interface.inc.php
index fb55f1651e..dddc91d9ab 100644
--- a/html/includes/print-interface.inc.php
+++ b/html/includes/print-interface.inc.php
@@ -112,7 +112,7 @@ if ($port_adsl['adslLineCoding'])
   echo("<br />");
   if ($ifHardType && $ifHardType != "") { echo("<span class=box-desc>" . $ifHardType . "</span>"); } else { echo("-"); }
   echo("</td><td width=150>");
-  if ($interface['ifPhysAddress'] && $interface['ifPhysAddress'] != "") { echo("<span class=box-desc>" . $interface['ifPhysAddress'] . "</span>"); } else { echo("-"); }
+  if ($interface['ifPhysAddress'] && $interface['ifPhysAddress'] != "") { echo("<span class=box-desc>" . formatMac($interface['ifPhysAddress']) . "</span>"); } else { echo("-"); }
   echo("<br />");
   if ($interface['ifMtu'] && $interface['ifMtu'] != "") { echo("<span class=box-desc>MTU " . $interface['ifMtu'] . "</span>"); } else { echo("-"); }
 }
@@ -269,4 +269,4 @@ if ($graph_type && is_file($graph_file))
   echo("</td></tr>");
 }
 
-?>
\ No newline at end of file
+?>