diff --git a/hbd/server/templates/live.html b/hbd/server/templates/live.html
index ceeacdb..e2eaf05 100644
--- a/hbd/server/templates/live.html
+++ b/hbd/server/templates/live.html
@@ -640,6 +640,7 @@
               <option value="warning">WARNING</option>
               <option value="critical">CRITICAL</option>
               <option value="recover">RECOVER</option>
+              <option value="unknown">UNKNOWN</option>
             </select>
             <input type="text" id="filter-msg" placeholder="Message…" title="Filter by message text" />
           </div>