diff --git a/cms/templates/textbooks.html b/cms/templates/textbooks.html
index f5c57ea87a..32fec23266 100644
--- a/cms/templates/textbooks.html
+++ b/cms/templates/textbooks.html
@@ -38,7 +38,7 @@ $(function() {
     $(window).on("beforeunload", function() {
         var dirty = textbooks.find(function(textbook) { return textbook.isDirty(); });
         if(dirty) {
-            return "You have unsaved changes. Do you really want to leave this page?";
+            return gettext("You have unsaved changes. Do you really want to leave this page?");
         }
     })
 })