diff --git a/ChangeLog b/ChangeLog
index ead7b2620..e61197a88 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-11-30  Andrey Borzenkov <arvidjaar@gmail.com>
+
+	* docs/grub.texi (sleep): Document exit codes.
+
 2013-11-30  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Ensure that -mno-unaligned-access or some equivalent option is used.
diff --git a/docs/grub.texi b/docs/grub.texi
index 529e328b2..ceea7eb3a 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -4883,7 +4883,8 @@ Alias for @code{hashsum --hash sha512 arg @dots{}}. See command @command{hashsum
 @deffn Command sleep [@option{--verbose}] [@option{--interruptible}] count
 Sleep for @var{count} seconds. If option @option{--interruptible} is given,
 allow @key{ESC} to interrupt sleep. With @option{--verbose} show countdown
-of remaining seconds.
+of remaining seconds. Exit code is set to 0 if timeout expired and to 1
+if timeout was interrupted by @key{ESC}.
 @end deffn