diff --git a/Containers/docker-socket-proxy/start.sh b/Containers/docker-socket-proxy/start.sh
index 18840a7c..a0a3e985 100644
--- a/Containers/docker-socket-proxy/start.sh
+++ b/Containers/docker-socket-proxy/start.sh
@@ -12,9 +12,11 @@ HAPROXYFILE="$(sed "s|NC_IPV4_PLACEHOLDER|$IPv4_ADDRESS_NC|" /haproxy.cfg)"
 echo "$HAPROXYFILE" > /tmp/haproxy.cfg
 
 IPv6_ADDRESS_NC="$(dig nextcloud-aio-nextcloud AAAA +short | grep '^[0-9a-f:]\+$' | sort | head -n1)"
-HAPROXYFILE="$(sed "s# || { src NC_IPV6_PLACEHOLDER }##g" /tmp/haproxy.cfg)"
-# shellcheck disable=SC2001
-HAPROXYFILE="$(echo "$HAPROXYFILE" | sed "s|NC_IPV6_PLACEHOLDER|$IPv6_ADDRESS_NC|")" 
+if [ -n "$IPv6_ADDRESS_NC" ]; then
+    HAPROXYFILE="$(sed "s|NC_IPV6_PLACEHOLDER|$IPv6_ADDRESS_NC|" /tmp/haproxy.cfg)"
+else
+    HAPROXYFILE="$(sed "s# || { src NC_IPV6_PLACEHOLDER }##g" /tmp/haproxy.cfg)"
+fi
 echo "$HAPROXYFILE" > /tmp/haproxy.cfg
 set +x