diff --git a/app/helpers/context_menus_helper.rb b/app/helpers/context_menus_helper.rb
index bfabbbb4e..cb8153549 100644
--- a/app/helpers/context_menus_helper.rb
+++ b/app/helpers/context_menus_helper.rb
@@ -20,19 +20,23 @@
 module ContextMenusHelper
   def context_menu_link(name, url, options={})
     label = name
-    options[:class] ||= ''
+    css_classes = [options[:class]]
+
     if options.delete(:selected)
-      options[:class] += ' icon disabled'
+      css_classes << 'icon disabled'
       options[:disabled] = true
       label = sprite_icon('checked', name)
     end
+
     if options.delete(:disabled)
       options.delete(:method)
       options.delete(:data)
       options[:onclick] = 'return false;'
-      options[:class] += ' disabled'
+      css_classes << 'disabled'
       url = '#'
     end
+
+    options[:class] = class_names(css_classes)
     link_to label, url, options
   end
 
diff --git a/test/helpers/context_menus_helper_test.rb b/test/helpers/context_menus_helper_test.rb
index df9ea3374..20ad333a3 100644
--- a/test/helpers/context_menus_helper_test.rb
+++ b/test/helpers/context_menus_helper_test.rb
@@ -28,7 +28,7 @@ class ContextMenusHelperTest < Redmine::HelperTest
 
     # When :selected is true
     html = context_menu_link('name', 'url', selected: true, class: 'class-a class-b')
-    assert_select_in html, 'a.class-a.class-b.icon.disabled.disabled[href=?]', '#' do
+    assert_select_in html, 'a.class-a.class-b.icon.disabled[href=?]', '#' do
       assert_select 'svg.icon-svg'
     end