diff --git a/lms/static/sass/course/_tabs.scss b/lms/static/sass/course/_tabs.scss
index b0e3dcb703..360d74738c 100644
--- a/lms/static/sass/course/_tabs.scss
+++ b/lms/static/sass/course/_tabs.scss
@@ -1,5 +1,5 @@
 div.static_tab_wrapper {
-
+	@include box-sizing(border-box);
   padding: 2em 2.5em;
 
   h1 {
@@ -9,5 +9,4 @@ div.static_tab_wrapper {
   section {
     margin: 0px 0px 20px;
   }
-
-}
+}
\ No newline at end of file