diff --git a/Changes.md b/Changes.md
index 91836be3..0b05d001 100644
--- a/Changes.md
+++ b/Changes.md
@@ -2,6 +2,7 @@
 ===================
 Version 3.9.0.4 - TBD
   1. Add 'Duplicate section' functionality from 'onetopic' format, thanks to David Herney Bernal for the code - #72.
+  2. Apply MDL-68330 - #74.
 
 Version 3.9.0.3 - 24/7/20
   1. Fix title.
diff --git a/styles.css b/styles.css
index ad4ec0c4..43cdee71 100644
--- a/styles.css
+++ b/styles.css
@@ -568,6 +568,10 @@ body.format-topcoll.dir-rtl .course-content ul.ctopics li.section .right {
     float: left;
 }
 
+body.format-topcoll .ctopics .mod-indent-outer {
+    width: 100% !important; /* Same as w-100 on MDL-68330. */
+}
+
 body.format-topcoll .ctopics .section .activity .mod-indent-outer,
 body.format-topcoll.editing.dir-rtl .ctopics .section .activity .mod-indent-outer {
     padding-left: 0;