diff --git a/dnsapi/dns_regru.sh b/dnsapi/dns_regru.sh
index 8ff380f0..56134418 100644
--- a/dnsapi/dns_regru.sh
+++ b/dnsapi/dns_regru.sh
@@ -94,7 +94,7 @@ _get_root() {
   for ITEM in ${domains_list}; do
     IDN_ITEM=${ITEM}
     case "${domain}" in
-    *${IDN_ITEM}*)
+    *\.${IDN_ITEM}*)
       _domain="$(_idn "${ITEM}")"
       _debug _domain "${_domain}"
       return 0