diff --git a/named.conf.slave b/named.conf.slave
index 1eaa0138..60e7823e 100644
--- a/named.conf.slave
+++ b/named.conf.slave
@@ -12,6 +12,12 @@ zone "envs.sh" {
 	allow-transfer { 167.114.154.31; };
 };
 
+zone "envs.o" {
+	type slave;
+	file "/var/cache/bind/fwd.envs.o";
+	masters { 89.163.145.170; };
+};
+
 zone "envs.tilde" {
 	type slave;
 	file "/var/cache/bind/fwd.envs.tilde";