diff --git a/app/mailers/activity_mailer.rb b/app/mailers/activity_mailer.rb
index 96fe8415cf1..ae15d8cb660 100644
--- a/app/mailers/activity_mailer.rb
+++ b/app/mailers/activity_mailer.rb
@@ -45,7 +45,7 @@ def came_comment(args = {})
 
     @user = @receiver
     link = "/#{@comment.commentable_type.downcase.pluralize}/#{@comment.commentable.id}"
-    @link_url = notification_redirector_path(
+    @link_url = notification_redirector_url(
       link: link,
       kind: Notification.kinds[:came_comment]
     )
@@ -298,7 +298,7 @@ def first_report(args = {})
     @user = @receiver
 
     @link_url = notification_redirector_url(
-      link: report_url(@report),
+      link: "/reports/#{@report.id}",
       kind: Notification.kinds[:first_report]
     )
 
diff --git a/app/views/activity_mailer/first_report.html.slim b/app/views/activity_mailer/first_report.html.slim
index 0afe381fda5..4bf96249a47 100644
--- a/app/views/activity_mailer/first_report.html.slim
+++ b/app/views/activity_mailer/first_report.html.slim
@@ -1,6 +1,6 @@
 = render '/notification_mailer/notification_mailer_template',
   title: "#{@report.user.login_name}さんのはじめての日報です！",
-  link_url: "/reports/#{@report.id}", link_text: 'この日報へ' do
+  link_url: @link_url, link_text: 'この日報へ' do
   p #{@report.user.login_name}さんのはじめての日報です。歓迎のコメントを投稿しよう！！
   div(style='border-top: solid 1px #ccc; height: 0;')
   = md2html(@report.description)