diff --git a/docker/routlin-dash/app/config_utils.py b/docker/routlin-dash/app/config_utils.py
index 3d67dad..be0ae01 100644
--- a/docker/routlin-dash/app/config_utils.py
+++ b/docker/routlin-dash/app/config_utils.py
@@ -731,7 +731,7 @@ def config_datasource(name):
                 row['local_entries']  = ''
                 row['source_display'] = row.get('url', '')
             vlan_names = used_by.get(bl.get('name', ''), [])
-            row['used_by'] = json.dumps([{'n': n, 'd': ''} for n in vlan_names]) if vlan_names else '<span class="text-muted">Not used by any VLANs</span>'
+            row['used_by'] = json.dumps([{'n': n, 'd': ''} for n in vlan_names]) if vlan_names else '<img src="/www/icons/warning.svg" style="width:1em;height:1em;vertical-align:middle;">&nbsp;<span class="text-muted">Not used by any VLANs</span>'
             rows.append(row)
         return rows