diff --git a/dnsapi/dns_nsupdate.sh b/dnsapi/dns_nsupdate.sh
index ad77502a..db653b6c 100755
--- a/dnsapi/dns_nsupdate.sh
+++ b/dnsapi/dns_nsupdate.sh
@@ -15,7 +15,7 @@ dns_nsupdate_add() {
   _saveaccountconf NSUPDATE_KEY "${NSUPDATE_KEY}"
   _info "adding ${fulldomain}. 60 in txt \"${txtvalue}\""
   nsupdate -k "${NSUPDATE_KEY}" <<EOF
-server ${NSUPDATE_SERVER} -p ${NSUPDATE_SERVER_PORT} 
+server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT} 
 update add ${fulldomain}. 60 in txt "${txtvalue}"
 send
 EOF
@@ -35,7 +35,7 @@ dns_nsupdate_rm() {
   [ -n "${NSUPDATE_SERVER_PORT}" ] || NSUPDATE_SERVER_PORT=53
   _info "removing ${fulldomain}. txt"
   nsupdate -k "${NSUPDATE_KEY}" <<EOF
-server ${NSUPDATE_SERVER} -p ${NSUPDATE_SERVER_PORT} 
+server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT} 
 update delete ${fulldomain}. txt
 send
 EOF