diff --git a/app/views/projects/_activity.html.haml b/app/views/projects/_activity.html.haml
index 31f1cf560e22354929334859155044023f903faa..12da62f4c64ddd4d41f10b6237b9027c441dfbd4 100644
--- a/app/views/projects/_activity.html.haml
+++ b/app/views/projects/_activity.html.haml
@@ -1,5 +1,5 @@
 %div{ class: container_class }
-  .nav-block.d-none.d-sm-block.activities
+  .nav-block.d-none.d-sm-flex.activities
     = render 'shared/event_filter'
     .controls
       = link_to project_path(@project, rss_url_options), title: s_("ProjectActivityRSS|Subscribe"), class: 'btn d-none d-sm-inline-block has-tooltip' do