--- sudo-1.6.8p9/env.c.orig	2005-10-26 08:53:26.000000000 +0200
+++ sudo-1.6.8p9/env.c	2005-10-26 08:56:21.000000000 +0200
@@ -89,6 +89,8 @@
 static const char *initial_badenv_table[] = {
     "IFS",
     "CDPATH",
+    "SHELLOPTS",
+    "PS4",
     "LOCALDOMAIN",
     "RES_OPTIONS",
     "HOSTALIASES",