diff --git a/app/views/admin/instances/_instance.html.haml b/app/views/admin/instances/_instance.html.haml
index 8a43960023..93f9bd4181 100644
--- a/app/views/admin/instances/_instance.html.haml
+++ b/app/views/admin/instances/_instance.html.haml
@@ -1,7 +1,7 @@
 .directory__tag
   = link_to admin_instance_path(instance) do
     %h4
-      = fa_icon 'warning fw' if instance.failing?
+      = fa_icon 'warning fw', title: t('admin.instances.availability.warning') if instance.failing?
       = instance.domain
 
       %small
diff --git a/config/locales/en.yml b/config/locales/en.yml
index d4a42e8675..a6ded38f72 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -490,6 +490,7 @@ en:
           other: Failed attempts on %{count} different days.
         no_failures_recorded: No failures on record.
         title: Availability
+        warning: The last attempt to connect to this server has been unsuccessful
       back_to_all: All
       back_to_limited: Limited
       back_to_warning: Warning