diff --git a/network/vif-route-qubes b/network/vif-route-qubes
index 851c453b9..68b03d656 100755
--- a/network/vif-route-qubes
+++ b/network/vif-route-qubes
@@ -196,6 +196,7 @@ if [ "${ip}" ]; then
     ${cmdprefix} ip addr "${ipcmd}" "${back_ip}/32" dev "${vif}"
     if [ "${back_ip6}" ] && [[ "${back_ip6}" != "fe80:"* ]] && [[ "$ipv6_disabled" = '0' ]]; then
         ${cmdprefix} ip addr "${ipcmd}" "${back_ip6}/128" dev "${vif}"
+        echo 1 >"/proc/sys/net/ipv6/conf/${vif}/proxy_ndp"
     fi
 else
     network_hooks "${command}" "${vif}"