diff --git a/app/assets/javascripts/darkswarm/services/authentication_service.js.coffee b/app/assets/javascripts/darkswarm/services/authentication_service.js.coffee
index 44a0819b7a..dedea5e312 100644
--- a/app/assets/javascripts/darkswarm/services/authentication_service.js.coffee
+++ b/app/assets/javascripts/darkswarm/services/authentication_service.js.coffee
@@ -9,6 +9,7 @@ Darkswarm.factory "AuthenticationService", (Navigation, $modal, $location)->
     open: (path = false)=>
       @modalInstance = $modal.open
         templateUrl: 'authentication.html'
+        windowClass: "login-modal"
       @modalInstance.result.then @close, @close
       @selectedPath = path || @selectedPath
       Navigation.navigate @selectedPath