diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index e732b0e637..dcbb879bb1 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -1380,6 +1380,12 @@ pdfReader.searchAnnotations = Search Annotations
 pdfReader.noAnnotations = Create an annotation to see it in the sidebar
 pdfReader.noExtractedText = No extracted text
 pdfReader.addComment = Add comment
+pdfReader.annotationComment = Annotation comment
+pdfReader.annotationText = Annotation text
+pdfReader.manageTags = Manage tags for this annotation
+pdfReader.openMenu = Open annotation menu
+pdfReader.thumbnails = Thumbnails
+pdfReader.tagSelectorMessage = Filter annotations by this tag
 pdfReader.addTags = Add tags…
 pdfReader.highlightText = Highlight Text
 pdfReader.underlineText = Underline Text