diff -Naur unbound-1.4.12.orig/doc/example.conf.in unbound-1.4.12/doc/example.conf.in
--- unbound-1.4.12.orig/doc/example.conf.in	2011-07-14 17:33:37.000000000 +0900
+++ unbound-1.4.12/doc/example.conf.in	2011-07-16 10:01:06.644402341 +0900
@@ -334,7 +334,7 @@
 	# with several entries, one file per entry.
 	# Zone file format, with DS and DNSKEY entries.
 	# Note this gets out of date, use auto-trust-anchor-file please.
-	# trust-anchor-file: ""
+	# trust-anchor-file: "@UNBOUND_ROOTKEY_FILE@"
 	
 	# Trusted key for validation. DS or DNSKEY. specify the RR on a
 	# single line, surrounded by "". TTL is ignored. class is IN default.