diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index 2d44b4bab6..553c40066f 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -69,6 +69,8 @@ pane.item.attachments.select			= Select a File
 pane.item.tags.count.zero       = %S tags:
 pane.item.tags.count.singular   = %S tag:
 pane.item.tags.count.plural     = %S tags:
+pane.item.tags.icon.user			= User-added tag
+pane.item.tags.icon.automatic	= Automatically added tag
 pane.item.related.count.zero    = %S related:
 pane.item.related.count.singular = %S related:
 pane.item.related.count.plural  = %S related: