diff --git a/systemvm/patches/debian/config/etc/dnsmasq.conf.tmpl b/systemvm/patches/debian/config/etc/dnsmasq.conf.tmpl
index 07c5902e118..447e74827d6 100644
--- a/systemvm/patches/debian/config/etc/dnsmasq.conf.tmpl
+++ b/systemvm/patches/debian/config/etc/dnsmasq.conf.tmpl
@@ -277,7 +277,9 @@ dhcp-hostsfile=/etc/dhcphosts.txt
 # or /etc/ethers. Equivalent to ISC "deny unknown-clients".
 # This relies on the special "known" tag which is set when
 # a host is matched.
-#dhcp-ignore=tag:!known
+#
+# When using bridged networks in ACS this prevents ack to DHCPINFORM etc. request
+dhcp-ignore=tag:!known
 
 # Send extra options which are tagged as "red" to any machine whose
 # DHCP vendorclass string includes the substring "Linux"