diff --git a/client/src/app/app.component.ts b/client/src/app/app.component.ts
index 5d8e8badf..84435b5db 100644
--- a/client/src/app/app.component.ts
+++ b/client/src/app/app.component.ts
@@ -44,7 +44,7 @@ export class AppComponent implements OnInit {
   }
 
   ngOnInit () {
-    document.getElementById('incompatible-browser').className += 'browser-ok'
+    document.getElementById('incompatible-browser').className += ' browser-ok'
 
     const pathname = window.location.pathname
     if (!pathname || pathname === '/') {