diff --git a/examples/sample.makefile.regen b/examples/sample.makefile.regen
index 57a5350..7b6eae3 100755
--- a/examples/sample.makefile.regen
+++ b/examples/sample.makefile.regen
@@ -27,7 +27,7 @@
 	EXTRA_CFLAGS="$EXTRA_CFLAGS -DHAVE_CONFIG_H"
 fi
 
-FIXEDPDU=`echo "[$ASN1PDU]" | sed -e "s/.*-pdu=auto.*//"`
+FIXEDPDU=`echo "[$ASN1CMDOPTS]" | sed -e "s/.*-pdu=auto.*//"`
 if test ! "$FIXEDPDU" ; then
 	EXTRA_CFLAGS="$EXTRA_CFLAGS -DASN_PDU_COLLECTION"
 fi