diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index 904f27b044..eab041a016 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -1392,6 +1392,14 @@ pdfReader.underlineText = Underline Text
 pdfReader.addNote = Add Note
 pdfReader.addText = Add Text
 pdfReader.selectArea = Select Area
+pdfReader.highlightAnnotation = Highlight annotation
+pdfReader.underlineAnnotation = Underline annotation
+pdfReader.noteAnnotation = Note annotation
+pdfReader.textAnnotation = Text annotation
+pdfReader.imageAnnotation = Image annotation
+pdfReader.inkAnnotation = Ink annotation
+pdfReader.searchResultIndex = Search result
+pdfReader.searchResultTotal = Total search results
 pdfReader.draw = Draw
 pdfReader.eraser = Eraser
 pdfReader.pickColor = Pick a Color