diff --git a/doc/btrbk.conf.5 b/doc/btrbk.conf.5
index 8244dd6..7b7afba 100644
--- a/doc/btrbk.conf.5
+++ b/doc/btrbk.conf.5
@@ -1,4 +1,4 @@
-.TH "btrbk.conf" "5" "2016-02-02" "btrbk v0.22.2" ""
+.TH "btrbk.conf" "5" "2016-02-29" "btrbk v0.23.0-dev" ""
 .\" disable hyphenation
 .nh
 .\" disable justification (adjust text to left margin only)
@@ -145,12 +145,21 @@ preserved. Every last weekly backup in a month is considered a
 monthly backup. Defaults to \[lq]all\[rq].
 .RE
 .PP
+\fBtarget_preserve_yearly\fR  all|<number>
+.RS 4
+Defines for how many years back yearly backups should be
+preserved. Every last monthly backup in a year is considered a yearly
+backup. Defaults to \[lq]0\[rq].
+.RE
+.PP
 \fBsnapshot_preserve_daily\fR
 .PD 0
 .PP
 \fBsnapshot_preserve_weekly\fR
 .PP
 \fBsnapshot_preserve_monthly\fR
+.PP
+\fBsnapshot_preserve_yearly\fR
 .RS 4
 Defines retention policy for the snapshots, with same semantics as the
 \fItarget_preserve_*\fR options.