diff --git a/tzfile.5 b/tzfile.5
index 454bd78..e0564a6 100644
--- a/tzfile.5
+++ b/tzfile.5
@@ -124,7 +124,7 @@ time zone environment variables.
 Finally there are
 .I tzh_stampcnt
 bytes of update time stamp,
-of the form "yyyy-mm-dd hh:mm",
+of the form "yyyy-mm-dd hh:mm:ss",
 designed to give an indication of when information on which the file
 is based was last updated.
 .PP