diff --git a/README.md b/README.md
index 0f7e9895..0d306a00 100644
--- a/README.md
+++ b/README.md
@@ -558,6 +558,16 @@ Whether to enable tos options.
 
 Default value: `false`.
 
+#### `tos_maxclock`
+
+Optional.
+
+Data type: Integer[1].
+
+Specifies the maxclock tos option.
+
+Default value: 6.
+
 #### `tos_minclock`
 
 Optional.
diff --git a/data/common.yaml b/data/common.yaml
index 47bcb51a..50921822 100644
--- a/data/common.yaml
+++ b/data/common.yaml
@@ -54,6 +54,7 @@ ntp::tinker: ~
 ntp::tos_ceiling: 15
 ntp::tos_cohort: 0
 ntp::tos_floor: 1
+ntp::tos_maxclock: 6
 ntp::tos_minclock: 3
 ntp::tos_minsane: 1
 ntp::tos: false
diff --git a/manifests/init.pp b/manifests/init.pp
index 6f10e7ff..53c91b57 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -108,6 +108,7 @@
   Optional[String] $step_tickers_template,
   Optional[Boolean] $tinker,
   Boolean $tos,
+  Optional[Integer[1]] $tos_maxclock,
   Optional[Integer[1]] $tos_minclock,
   Optional[Integer[1]] $tos_minsane,
   Optional[Integer[1]] $tos_floor,
diff --git a/templates/ntp.conf.epp b/templates/ntp.conf.epp
index a9f0ac04..05a612b4 100644
--- a/templates/ntp.conf.epp
+++ b/templates/ntp.conf.epp
@@ -130,7 +130,7 @@ leapfile <%= $ntp::leapfile %>
 <% } -%>
 <%# -%>
 <% if $ntp::tos {-%>
-tos <% if $ntp::tos_minclock {-%> minclock <%= $ntp::tos_minclock %><% } %> <% if $ntp::tos_minsane {-%> minsane <%= $ntp::tos_minsane %> <% } %><% if $ntp::tos_floor {-%> floor <%= $ntp::tos_floor %><% } %> <% if $ntp::tos_ceiling {-%> ceiling <%= $ntp::tos_ceiling %><% } %> <% if $ntp::tos_cohort {-%> cohort <%= $ntp::tos_cohort %><% } %>
+tos <% if $ntp::tos_minclock {-%> minclock <%= $ntp::tos_minclock %><% } %> <% if $ntp::tos_maxclock {-%> maxclock <%= $ntp::tos_maxclock %><% } %> <% if $ntp::tos_minsane {-%> minsane <%= $ntp::tos_minsane %><% } %> <% if $ntp::tos_floor {-%> floor <%= $ntp::tos_floor %><% } %> <% if $ntp::tos_ceiling {-%> ceiling <%= $ntp::tos_ceiling %><% } %> <% if $ntp::tos_cohort {-%> cohort <%= $ntp::tos_cohort %><% } %>
 <% } %>
 <%# -%>
 <% if $ntp::authprov {-%>