diff --git a/app/views/user_mailer/warning.html.haml b/app/views/user_mailer/warning.html.haml
index 030a57bb452dd3734e5357adef02aa6c4b744145..1105f2062f627362d68bf768fa6becfd26da1bfe 100644
--- a/app/views/user_mailer/warning.html.haml
+++ b/app/views/user_mailer/warning.html.haml
@@ -42,11 +42,11 @@
                               - unless @warning.text.blank?
                                 = Formatter.instance.linkify(@warning.text)
 
-                              - unless @statuses.empty?
+                              - unless @statuses&.empty?
                                 %p
                                   %strong= t('user_mailer.warning.statuses')
 
-- unless @statuses.empty?
+- unless @statuses&.empty?
   - @statuses.each_with_index do |status, i|
     = render 'notification_mailer/status', status: status, i: i + 1, highlighted: true
 
diff --git a/app/views/user_mailer/warning.text.erb b/app/views/user_mailer/warning.text.erb
index 24c1f86f2b7edd6261e1754bc33e87e6986f92aa..45ad3b64d4b0ef99014ad232c9d4e84d5aa51ac0 100644
--- a/app/views/user_mailer/warning.text.erb
+++ b/app/views/user_mailer/warning.text.erb
@@ -7,7 +7,7 @@
 
 <% end %>
 <%= @warning.text %>
-<% unless @statuses.empty? %>
+<% unless @statuses&.empty? %>
 <%= t('user_mailer.warning.statuses') %>
 
 <% @statuses.each do |status| %>