diff --git a/doc/examples/vsnfd.prf b/doc/examples/vsnfd.prf
index 061e06982..2884fe71e 100644
--- a/doc/examples/vsnfd.prf
+++ b/doc/examples/vsnfd.prf
@@ -15,7 +15,7 @@ enable-crl-checks
 [gpg-agent]
 enable-extended-key-format
 default-cache-ttl 900
-max-cache-ttl [] 3600
+max-cache-ttl 3600
 no-allow-mark-trusted
 no-allow-external-cache
 enforce-passphrase-constraints