diff --git a/app/views/welcome/robots.text.erb b/app/views/welcome/robots.text.erb
index 6f66278ad..16acc8111 100644
--- a/app/views/welcome/robots.text.erb
+++ b/app/views/welcome/robots.text.erb
@@ -10,3 +10,6 @@ Disallow: <%= url_for(issues_gantt_path) %>
 Disallow: <%= url_for(issues_calendar_path) %>
 Disallow: <%= url_for(activity_path) %>
 Disallow: <%= url_for(search_path) %>
+Disallow: <%= url_for(issues_path(:sort => '')) %>
+Disallow: <%= url_for(issues_path(:query_id => '')) %>
+Disallow: <%= url_for(issues_path) %>?*set_filter=
diff --git a/test/integration/welcome_test.rb b/test/integration/welcome_test.rb
index e18a9da65..e28e97ba5 100644
--- a/test/integration/welcome_test.rb
+++ b/test/integration/welcome_test.rb
@@ -29,5 +29,7 @@ class WelcomeTest < Redmine::IntegrationTest
     assert_equal 'text/plain', @response.media_type
     # Redmine::Utils.relative_url_root does not effect on Rails 5.1.4.
     assert @response.body.match(%r{^Disallow: /projects/ecookbook/issues\r?$})
+    assert @response.body.match(%r{^Disallow: /issues\?sort=\r?$})
+    assert @response.body.match(%r{^Disallow: /issues\?\*set_filter=\r?$})
   end
 end