diff --git a/web-ui/src/app/components/masternodes/masternodes.component.html b/web-ui/src/app/components/masternodes/masternodes.component.html
index 552f8da..a5671ac 100644
--- a/web-ui/src/app/components/masternodes/masternodes.component.html
+++ b/web-ui/src/app/components/masternodes/masternodes.component.html
@@ -24,7 +24,7 @@
             <td>{{item.ip}}</td>
             <td>{{item.protocol}}</td>
             <td>{{item.status}}</td>
-            <td>{{item.activeSeconds}}</td>
+            <td>{{Math.max(item.activeSeconds, 0) | amDuration:'seconds'}}</td>
             <td>{{item.lastSeen * 1000 | date:'MMMM d, y, h:mm:ss a'}}</td>
             <td>
               <a routerLink="/addresses/{{item.payee}}">{{item.payee}}</a>
diff --git a/web-ui/src/app/components/masternodes/masternodes.component.ts b/web-ui/src/app/components/masternodes/masternodes.component.ts
index e462fdf..3f9abac 100644
--- a/web-ui/src/app/components/masternodes/masternodes.component.ts
+++ b/web-ui/src/app/components/masternodes/masternodes.component.ts
@@ -17,6 +17,8 @@ import { ErrorService } from '../../services/error.service';
 })
 export class MasternodesComponent implements OnInit {
 
+  Math: Math = Math;
+
   // pagination
   total = 0;
   currentPage = 1;