diff --git a/ui/src/app/modules/plugins/plugin-card/plugin-card.component.ts b/ui/src/app/modules/plugins/plugin-card/plugin-card.component.ts
index 8784823cc..b45eb1637 100644
--- a/ui/src/app/modules/plugins/plugin-card/plugin-card.component.ts
+++ b/ui/src/app/modules/plugins/plugin-card/plugin-card.component.ts
@@ -63,7 +63,7 @@ export class PluginCardComponent implements OnInit {
       gt(this.$settings.env.homebridgeVersion, '1.5.0-beta.1') : false;
 
     // detect mobile
-    this.detectMobile = (('ontouchstart' in document.documentElement) || (screen.width <= 768)) ? true : false;
+    this.detectMobile = (('ontouchstart' in document.documentElement) || (window.screen.width <= 768)) ? true : false;
   }
 
   @Input() set childBridges(childBridges: any[]) {