diff --git a/chrome/locale/en-US/zotero/reader.ftl b/chrome/locale/en-US/zotero/reader.ftl
index 216db16df1..ac6300b392 100644
--- a/chrome/locale/en-US/zotero/reader.ftl
+++ b/chrome/locale/en-US/zotero/reader.ftl
@@ -125,7 +125,8 @@ reader-double = Double
 reader-theme-name = Theme Name:
 reader-background = Background:
 reader-foreground = Foreground:
-reader-focus-mode = Focus Mode
+reader-reading-mode = Reading Mode
+reader-reading-mode-not-supported = Reading Mode is not supported in this document.
 reader-clear-selection = Clear Selection
 
 reader-move-annotation-start-key =