diff --git a/package/lean/luci-app-xlnetacc/Makefile b/package/lean/luci-app-xlnetacc/Makefile
index d863c3592..f60c4e486 100644
--- a/package/lean/luci-app-xlnetacc/Makefile
+++ b/package/lean/luci-app-xlnetacc/Makefile
@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-xlnetacc
 PKG_VERSION:=1.0.3
-PKG_RELEASE:=8
+PKG_RELEASE:=9
 
 PKG_LICENSE:=GPLv2
 PKG_MAINTAINER:=Sense <sensec@gmail.com>
diff --git a/package/lean/luci-app-xlnetacc/files/root/usr/bin/xlnetacc.sh b/package/lean/luci-app-xlnetacc/files/root/usr/bin/xlnetacc.sh
index e4c18ef81..57fac717a 100644
--- a/package/lean/luci-app-xlnetacc/files/root/usr/bin/xlnetacc.sh
+++ b/package/lean/luci-app-xlnetacc/files/root/usr/bin/xlnetacc.sh
@@ -413,7 +413,7 @@ isp_upgrade() {
 			local bandwidth
 			json_select "bandwidth" >/dev/null 2>&1
 			json_get_var bandwidth "downstream"
-			bandwidth=$(expr ${bandwidth:-0} / 1024)
+			[ ${bandwidth:=0} -ge 1024 ] && bandwidth=$(( $bandwidth / 1024 ))
 			local outmsg="${link_cn}提速成功，带宽已提升到 ${bandwidth}M"; _log "$outmsg" $(( 1 | $1 * 8 ))
 			[ $1 -eq 1 ] && down_acc=2 || up_acc=2
 			;;