diff --git a/group-assignment/main.tf b/group-assignment/main.tf
index 9967951..ab4c9b9 100644
--- a/group-assignment/main.tf
+++ b/group-assignment/main.tf
@@ -101,7 +101,7 @@ resource "ldap_object_attributes" "group" {
 
   dn = local.ldap_access_dn
   attributes = [
-    { groupMember = ldap_object.group.dn },
+    { groupMember = try(ldap_object.group[0].dn, "") },
   ]
 }