diff --git a/overcloud.j2.yaml b/overcloud.j2.yaml
index 878a546f13..d24ec00a67 100644
--- a/overcloud.j2.yaml
+++ b/overcloud.j2.yaml
@@ -423,6 +423,7 @@ parameter_groups:
 - label: deprecated
   description: Do not use deprecated params, they will be removed.
   parameters:
+    - DnsServers
 {%- set parameter_groups_defined = true %}
 {%- endif %}
 {%- endif %}
diff --git a/releasenotes/notes/deprecate-DnsServers-a65541c2dceced08.yaml b/releasenotes/notes/deprecate-DnsServers-a65541c2dceced08.yaml
new file mode 100644
index 0000000000..6d8f0a17d9
--- /dev/null
+++ b/releasenotes/notes/deprecate-DnsServers-a65541c2dceced08.yaml
@@ -0,0 +1,15 @@
+---
+deprecations:
+  - |
+    The tripleo-heat-templates parameter DnsServers has been deprecated.
+
+    The dns_nameservers from the ctlplane subnets has been used by default for
+    overcloud node nameservers for a long time, see:
+    https://review.opendev.org/579582.
+
+    Since Wallaby network configuration is applied prior to the Heat stack
+    create, during overcloud node provisioning. In this case the THT parameter
+    DnsServers is not available when network configuration is applied.
+    Effectively the DnsServers parameter cannot be used in Wallaby and later
+    releases.
+