diff --git a/ChangeLog b/ChangeLog
index c92e0c732..545f7a5b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-21  Daniel Shahaf  <d.s@daniel.shahaf.name>
+
+	* unposted: README: Give the 'zsystem flock' limit in
+	pretty-printed form as well.
+
 2020-04-21  dana  <dana@dana.is>
 
 	* github #54: davey hathorn: Completion/Unix/Command/_dig:
diff --git a/README b/README
index 31ee80d4a..b87f660bf 100644
--- a/README
+++ b/README
@@ -62,7 +62,7 @@ an end-of-options guard (same as "ls --").
 The sh-compatible function definition syntax, "f() { ... }", is unchanged.
 
 The time-out (-t) value given to zsh/system's `zsystem flock` command is
-now limited to 2^30-1 seconds.
+now limited to 2^30-1 seconds (= a little over 34 years).
 
 Incompatibilities between 5.7.1 and 5.8
 ---------------------------------------