diff --git a/app/views/issue_relations/_form.html.erb b/app/views/issue_relations/_form.html.erb
index b55e93eac..2d132c192 100644
--- a/app/views/issue_relations/_form.html.erb
+++ b/app/views/issue_relations/_form.html.erb
@@ -17,6 +17,7 @@
 </span>
 <%= submit_tag l(:button_add) %>
 <%= link_to_function l(:button_cancel), '$("#new-relation-form").hide();'%>
+<em class="info"><%= l(:text_comma_separated) %></em>
 </p>
 
 <%= javascript_tag "multipleAutocompleteField('relation_issue_to_id', '#{escape_javascript auto_complete_issues_path(:project_id => @project, :scope => (Setting.cross_project_issue_relations? ? 'all' : nil), :issue_id => @issue.id)}')" %>
diff --git a/test/functional/issues_controller_test.rb b/test/functional/issues_controller_test.rb
index fd66193e1..a17478b7e 100644
--- a/test/functional/issues_controller_test.rb
+++ b/test/functional/issues_controller_test.rb
@@ -2512,6 +2512,8 @@ class IssuesControllerTest < Redmine::ControllerTest
       assert_select 'div#relations' do
         assert_select 'a', :text => /#2$/
         assert_select 'a', :text => /#4$/, :count => 0
+        assert_select 'form#new-relation-form input#relation_issue_to_id'
+        assert_select 'form#new-relation-form em.info', :text => l(:text_comma_separated)
       end
     end
   end