diff --git a/feeds/tip/luci/luci-mod-ucentral/root/sbin/certupdate b/feeds/tip/luci/luci-mod-ucentral/root/sbin/certupdate
index 8d760ab2d..d29eed8a7 100755
--- a/feeds/tip/luci/luci-mod-ucentral/root/sbin/certupdate
+++ b/feeds/tip/luci/luci-mod-ucentral/root/sbin/certupdate
@@ -17,11 +17,14 @@ mkdir -p /tmp/certs
 tar x -C /tmp/certs -f /tmp/certs.tar
 
 # make sure the required files exist
-[ -f /tmp/certs/cas.pem -a -f /tmp/certs/key.pem -a -f /tmp/certs/cert.pem ] || exit 1
+[ -f /tmp/certs/key.pem -a -f /tmp/certs/cert.pem ] || exit 1
 
 # copy the certificates to /etc
 cp /tmp/certs/*.pem /certificates
 
+# remove old operational certs
+rm /certificates/operational.*
+
 # copy dev-id or gateway.json
 for a in gateway.json; do
 	if [ -f /tmp/certs/$a ]; then