diff --git a/sass/_textbook.scss b/sass/_textbook.scss
index f0e43cd523..d1747e9e3b 100644
--- a/sass/_textbook.scss
+++ b/sass/_textbook.scss
@@ -7,6 +7,7 @@ div.book-wrapper {
     @extend .tran;
 
     ul#booknav {
+      font-size: 12px;
 
       a {
         color: #000;