diff --git a/manifests/mdns.pp b/manifests/mdns.pp
index 841cdb4e..a392d990 100644
--- a/manifests/mdns.pp
+++ b/manifests/mdns.pp
@@ -32,6 +32,10 @@
 #   (Optional) mDNS TCP Backlog.
 #   Defaults to $facts['os_service_default'].
 #
+# [*tcp_keepidle*]
+#   (Optional) mDNS TCP Keepidle in seconds.
+#   Defaults to $facts['os_service_default'].
+#
 # [*tcp_recv_timeout*]
 #   (Optional) mDNS TCP Receive Timeout.
 #   Defaults to $facts['os_service_default'].
@@ -56,6 +60,7 @@ class designate::mdns (
   $workers                = $facts['os_workers'],
   $threads                = $facts['os_service_default'],
   $tcp_backlog            = $facts['os_service_default'],
+  $tcp_keepidle           = $facts['os_service_default'],
   $tcp_recv_timeout       = $facts['os_service_default'],
   $query_enforce_tsig     = $facts['os_service_default'],
   $max_message_size       = $facts['os_service_default'],
@@ -69,6 +74,7 @@ class designate::mdns (
     'service:mdns/workers'            : value => $workers;
     'service:mdns/threads'            : value => $threads;
     'service:mdns/tcp_backlog'        : value => $tcp_backlog;
+    'service:mdns/tcp_keepidle'       : value => $tcp_keepidle;
     'service:mdns/tcp_recv_timeout'   : value => $tcp_recv_timeout;
     'service:mdns/query_enforce_tsig' : value => $query_enforce_tsig;
     'service:mdns/max_message_size'   : value => $max_message_size;
diff --git a/releasenotes/notes/mdns-tcp_keepidle-d358daa4768b3ed3.yaml b/releasenotes/notes/mdns-tcp_keepidle-d358daa4768b3ed3.yaml
new file mode 100644
index 00000000..ce8e4f3b
--- /dev/null
+++ b/releasenotes/notes/mdns-tcp_keepidle-d358daa4768b3ed3.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``designate::mdns::tcp_keepidle`` parameter has been added.
diff --git a/spec/classes/designate_mdns_spec.rb b/spec/classes/designate_mdns_spec.rb
index b06483fb..83b4cdc6 100644
--- a/spec/classes/designate_mdns_spec.rb
+++ b/spec/classes/designate_mdns_spec.rb
@@ -35,6 +35,7 @@ describe 'designate::mdns' do
         is_expected.to contain_designate_config('service:mdns/workers').with_value(8)
         is_expected.to contain_designate_config('service:mdns/threads').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('service:mdns/tcp_backlog').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_designate_config('service:mdns/tcp_keepidle').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('service:mdns/tcp_recv_timeout').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('service:mdns/query_enforce_tsig').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_designate_config('service:mdns/max_message_size').with_value('<SERVICE DEFAULT>')
@@ -47,6 +48,7 @@ describe 'designate::mdns' do
             :workers            => 2,
             :threads            => 4,
             :tcp_backlog        => 100,
+            :tcp_keepidle       => 10,
             :tcp_recv_timeout   => 0.5,
             :query_enforce_tsig => true,
             :max_message_size   => 65535,
@@ -57,6 +59,7 @@ describe 'designate::mdns' do
           is_expected.to contain_designate_config('service:mdns/workers').with_value(2)
           is_expected.to contain_designate_config('service:mdns/threads').with_value(4)
           is_expected.to contain_designate_config('service:mdns/tcp_backlog').with_value(100)
+          is_expected.to contain_designate_config('service:mdns/tcp_keepidle').with_value(10)
           is_expected.to contain_designate_config('service:mdns/tcp_recv_timeout').with_value(0.5)
           is_expected.to contain_designate_config('service:mdns/query_enforce_tsig').with_value(true)
           is_expected.to contain_designate_config('service:mdns/max_message_size').with_value(65535)