diff --git a/src/courseware/course/Course.jsx b/src/courseware/course/Course.jsx
index 5f385b90b5..a2ceb92201 100644
--- a/src/courseware/course/Course.jsx
+++ b/src/courseware/course/Course.jsx
@@ -37,7 +37,7 @@ const Course = ({
   const sequence = useModel('sequences', sequenceId);
   const section = useModel('sections', sequence ? sequence.sectionId : null);
   const enableNewSidebar = getConfig().ENABLE_NEW_SIDEBAR;
-  const navigationDisabled = sequence ? sequence.navigationDisabled : false;
+  const navigationDisabled = sequence?.navigationDisabled ?? false;
 
   const pageTitleBreadCrumbs = [
     sequence,