diff --git a/REFERENCE.md b/REFERENCE.md
index 28d2e9d5..f36fb25f 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -1856,7 +1856,7 @@ Struct[{
     Optional[credentials]      => Variant[String[1], Sensitive[String[1]]],
     Optional[realm]            => String[1],
     Optional[secprops]         => String[1],
-    Optional[keepalive]        => Pattern['\A\d{2}:\d{2}:\d{2}\z'],
+    Optional[keepalive]        => Pattern['\A\d+:\d+:\d+\z'],
     Optional[starttls]         => Enum['yes', 'critical'],
     Optional[tls_cert]         => Stdlib::Absolutepath,
     Optional[tls_key]          => Stdlib::Absolutepath,
diff --git a/types/syncrepl.pp b/types/syncrepl.pp
index 7876cefc..191b5daa 100644
--- a/types/syncrepl.pp
+++ b/types/syncrepl.pp
@@ -28,7 +28,7 @@
     Optional[credentials]      => Variant[String[1], Sensitive[String[1]]],
     Optional[realm]            => String[1],
     Optional[secprops]         => String[1],
-    Optional[keepalive]        => Pattern['\A\d{2}:\d{2}:\d{2}\z'],
+    Optional[keepalive]        => Pattern['\A\d+:\d+:\d+\z'],
     Optional[starttls]         => Enum['yes', 'critical'],
     Optional[tls_cert]         => Stdlib::Absolutepath,
     Optional[tls_key]          => Stdlib::Absolutepath,