diff --git a/share/views/sidebar/device/ports.tt b/share/views/sidebar/device/ports.tt
index f893b7ae..10865200 100644
--- a/share/views/sidebar/device/ports.tt
+++ b/share/views/sidebar/device/ports.tt
@@ -86,7 +86,7 @@
               <div id="nd_nodeprops" class="collapse">
                 <ul class="nd_inputs-list unstyled">
                   <li>
-                    <em class="muted">MAC address format:</em><br/>
+                    <em class="muted">MAC address display as:</em><br/>
                     <select id="nd_mac-format" name="mac_format">
                       [% FOREACH format IN [ 'IEEE', 'Cisco', 'Microsoft', 'Sun' ] %]
                       <option[% ' selected="selected"' IF vars.sidebar_defaults.device_ports.mac_format == format %]>[% format | html_entity %]</option>
diff --git a/share/views/sidebar/search/node.tt b/share/views/sidebar/search/node.tt
index 80560d31..b47de328 100644
--- a/share/views/sidebar/search/node.tt
+++ b/share/views/sidebar/search/node.tt
@@ -38,7 +38,8 @@
                   Archived Data &nbsp;<i class="icon-book text-warning"></i></span>
               </label>
             </div>
-            <div class="clearfix input-prepend">
+            <div class="clearfix input-prepend"
+              rel="tooltip" data-placement="left" data-offset="5" data-title="Only for IEEE format MACs">
               <label class="add-on nd_sidebar-legend">
                 <input type="checkbox" id="node_partial"
                   name="partial"[% ' checked="checked"' IF vars.sidebar_defaults.search_node.partial %]/>
@@ -62,7 +63,7 @@
                 type="text" name="daterange" value="[% vars.sidebar_defaults.search_node.daterange | html_entity %]"/>
             </div>
             <div class="clearfix">
-              <em class="muted">MAC address format:</em><br/>
+              <em class="muted">MAC address display as:</em><br/>
               <select id="nd_node-mac-format" name="mac_format">
                 [% FOREACH format IN [ 'IEEE', 'Cisco', 'Microsoft', 'Sun' ] %]
                 <option[% ' selected="selected"' IF vars.sidebar_defaults.search_node.mac_format == format %]>[% format | html_entity %]</option>