diff --git a/course/format/templates/local/content/cm/activity.mustache b/course/format/templates/local/content/cm/activity.mustache
index 843cbbf75f8..2b645c00fec 100644
--- a/course/format/templates/local/content/cm/activity.mustache
+++ b/course/format/templates/local/content/cm/activity.mustache
@@ -114,7 +114,7 @@
     {{/activityinfo}}
     {{#altcontent}}
         <div class="activity-altcontent {{#hasname}}course-description-item small{{/hasname}}{{^hasname}}contentwithoutlink{{/hasname}} d-flex">
-            <div class="flex-fill description-inner">
+            <div class="flex-fill description-inner text-break">
                 {{{altcontent}}}
             </div>
         </div>