diff --git a/net/cvsup-mirror/Makefile b/net/cvsup-mirror/Makefile
index 8c06ab65e7d5..86c7acdd2371 100644
--- a/net/cvsup-mirror/Makefile
+++ b/net/cvsup-mirror/Makefile
@@ -7,7 +7,7 @@
 
 PORTNAME=	cvsup-mirror
 PORTVERSION=	1.3
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net
 DISTFILES=
 
diff --git a/net/cvsup-mirror/files/update.sh b/net/cvsup-mirror/files/update.sh
index 97a224bfc9ed..025900a31306 100644
--- a/net/cvsup-mirror/files/update.sh
+++ b/net/cvsup-mirror/files/update.sh
@@ -25,7 +25,7 @@ umask 22
 
 for i in $(/usr/bin/jot ${num_logs} $((${num_logs}-1)) 0)
 do
-	test -f ${log}.$i${gz_ext} && mv -f ${log}.$i${gz_ext} ${log}.$((i+1))${gz_ext}
+	test -f ${log}.$i${gz_ext} && mv -f ${log}.$i${gz_ext} ${log}.$(($i+1))${gz_ext}
 done
 
 test -f ${log}   && mv -f ${log}   ${log}.0 && [ ${use_gzip} != 0 ] && /usr/bin/gzip -9 ${log}.0