diff --git a/dnsapi/dns_ipv64.sh b/dnsapi/dns_ipv64.sh
index b50b8663..54470119 100755
--- a/dnsapi/dns_ipv64.sh
+++ b/dnsapi/dns_ipv64.sh
@@ -37,7 +37,7 @@ dns_ipv64_add() {
   _debug _domain "$_domain"
 
   # convert to lower case
-  _domain="$(echo "$_domain" | _lower_case')"
+  _domain="$(echo "$_domain" | _lower_case)"
   _sub_domain="$(echo "$_sub_domain" | _lower_case)"
   # Now add the TXT record
   _info "Trying to add TXT record"