diff --git a/build-deluge.jenkins b/build-deluge.jenkins
index de16300..ca3092b 100644
--- a/build-deluge.jenkins
+++ b/build-deluge.jenkins
@@ -57,7 +57,7 @@ if [[ -z "\${DDNS_HOST}" ]] || [[ "\${DDNS_HOST}" == "" ]]; then
 	exit 100
 fi
 
-DIP=\$(dig @ns1.google.com TXT o-o.myaddr.l.google.com +short | sed -e 's/"//g')
+DIP=\$(dig -4 @ns1.google.com TXT o-o.myaddr.l.google.com +short | sed -e 's/"//g')
 if [[ -z "\${DIP+x}" ]] || [[ "\${DIP}" == "" ]]; then
 	printf '%s\\n' "Unable to detect real-world IP."
 	exit 100