diff --git a/update_ip.sh b/update_ip.sh
index 10e319c..fbf3135 100755
--- a/update_ip.sh
+++ b/update_ip.sh
@@ -17,6 +17,11 @@ if [ -f "${HOME}/${cache}" ]; then
 	old_ip=$(cat "${HOME}/${cache}")
 fi
 
+# Exit if we're at an IPv6 address
+if [ -z "${ip##*:*}" ]; then
+    exit;
+fi
+
 if [ "${set_ip}" = "${ip}" ] && [ "${ip}" = "${old_ip}" ]; then
 	exit;
 else