diff --git a/app/models/mailer.rb b/app/models/mailer.rb
index e13abacbd..ecfdee2a6 100644
--- a/app/models/mailer.rb
+++ b/app/models/mailer.rb
@@ -71,6 +71,7 @@ class Mailer < ActionMailer::Base
   def issue_add(user, issue)
     redmine_headers 'Project' => issue.project.identifier,
                     'Issue-Id' => issue.id,
+                    'Issue-Tracker' => issue.tracker.name,
                     'Issue-Author' => issue.author.login
     redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
     message_id issue
@@ -102,6 +103,7 @@ class Mailer < ActionMailer::Base
     issue = journal.journalized
     redmine_headers 'Project' => issue.project.identifier,
                     'Issue-Id' => issue.id,
+                    'Issue-Tracker' => issue.tracker.name,
                     'Issue-Author' => issue.author.login
     redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
     message_id journal
diff --git a/test/unit/mailer_test.rb b/test/unit/mailer_test.rb
index 89b2a451d..7e129a4f5 100644
--- a/test/unit/mailer_test.rb
+++ b/test/unit/mailer_test.rb
@@ -208,6 +208,7 @@ class MailerTest < ActiveSupport::TestCase
     assert_equal 'auto-generated', mail.header['Auto-Submitted'].to_s
     # List-Id should not include the display name "Redmine"
     assert_equal '<redmine.example.net>', mail.header['List-Id'].to_s
+    assert_equal 'Bug', mail.header['X-Redmine-Issue-Tracker'].to_s
   end
 
   def test_email_headers_should_include_sender