diff --git a/en_US.ISO8859-1/books/handbook/firewalls/chapter.xml b/en_US.ISO8859-1/books/handbook/firewalls/chapter.xml
index 1b3cc6725d..475a3e12e3 100644
--- a/en_US.ISO8859-1/books/handbook/firewalls/chapter.xml
+++ b/en_US.ISO8859-1/books/handbook/firewalls/chapter.xml
@@ -2064,7 +2064,7 @@ pif="dc0"     # interface name of NIC attached to Internet</programlisting>
 &dollar;cmd 00250 allow icmp from any to any out via &dollar;pif keep-state
 
 # Allow outbound NTP
-&dollar;cmd 00260 allow tcp from any to any 37 out via &dollar;pif setup keep-state
+&dollar;cmd 00260 allow udp from any to any 123 out via &dollar;pif setup keep-state
 
 # Allow outbound SSH
 &dollar;cmd 00280 allow tcp from any to any 22 out via &dollar;pif setup keep-state