diff --git a/app/helpers/dmsf_queries_helper.rb b/app/helpers/dmsf_queries_helper.rb
index c68c08c2..82060123 100644
--- a/app/helpers/dmsf_queries_helper.rb
+++ b/app/helpers/dmsf_queries_helper.rb
@@ -36,7 +36,7 @@ module DmsfQueriesHelper
                  content_tag(:span,
                              '',
                              title: l(:title_locked_by_user, user: file.locked_by),
-                             class: 'icon icon-unlock')
+                             class: 'icon icon-unlock dmsf-icon-unlock')
         end
       when 'folder'
         folder = DmsfFolder.find_by(id: item.id)
@@ -45,7 +45,7 @@ module DmsfQueriesHelper
                  content_tag(:span,
                              '',
                              title: l(:title_locked_by_user, user: folder.locked_by),
-                             class: 'icon icon-unlock')
+                             class: 'icon icon-unlock dmsf-icon-unlock')
         end
       end
       content_tag(:span, val) +
diff --git a/assets/stylesheets/easy_dmsf.css b/assets/stylesheets/easy_dmsf.css
index 74922a75..10797354 100644
--- a/assets/stylesheets/easy_dmsf.css
+++ b/assets/stylesheets/easy_dmsf.css
@@ -30,7 +30,7 @@
 .dmsf-tree.idnt-9 td.dmsf-title { padding-left: 5.5em; }
 
 /* Unlock icon */
-span.icon-unlock {
+span.dmsf-icon-unlock {
     margin-left: 4px;
 }