diff --git a/courses/ASTR-4240.html b/courses/ASTR-4240.html
index 631151bd0..a3929ca97 100644
--- a/courses/ASTR-4240.html
+++ b/courses/ASTR-4240.html
@@ -41,6 +41,14 @@
             4 credits
           </span>
         </div>
+        <div id="crosslist-container">
+          <div id="crosslist-title" class="rel-info-title">
+            Cross-listed with:
+          </div>
+          <div id=crosslist-classes" class="rel-info-courses">
+            <a class="course-pill" href="PHYS-4240">PHYS-4240 General Relativity</a>
+          </div>
+        </div>
         <div id="prereq-container" class="rel-info-container">
           <div id="prereq-title" class="rel-info-title">
             Prereqs: