diff --git a/ex201/ex201.1.end/container_files/seed-data/bootstrap.gsh b/ex201/ex201.1.end/container_files/seed-data/bootstrap.gsh
index 9093c3c..0b4561b 100644
--- a/ex201/ex201.1.end/container_files/seed-data/bootstrap.gsh
+++ b/ex201/ex201.1.end/container_files/seed-data/bootstrap.gsh
@@ -2,6 +2,7 @@ gs = GrouperSession.startRootSession();
 
 
 // ex201.1.1
+addStem("ref", "student", "student")
 addGroup("ref:student", "students", "students");
 
 addGroup("ref:student", "class2019", "class2019");