diff --git a/build_debian.sh b/build_debian.sh
index 7d763a46f2e5..009cf3bf4b88 100755
--- a/build_debian.sh
+++ b/build_debian.sh
@@ -237,6 +237,8 @@ set /files/etc/sysctl.conf/net.ipv6.conf.eth0.forwarding 0
 
 set /files/etc/sysctl.conf/net.ipv6.conf.default.accept_dad 0
 set /files/etc/sysctl.conf/net.ipv6.conf.all.accept_dad 0
+
+set /files/etc/sysctl.conf/net.ipv6.conf.eth0.accept_ra_defrtr 0
 " -r $FILESYSTEM_ROOT
 
 ## docker-py is needed by Ansible docker module