diff --git a/Shorewall-init/shorewall-init.service b/Shorewall-init/shorewall-init.service
index 0a1d07837..b4f2635b5 100644
--- a/Shorewall-init/shorewall-init.service
+++ b/Shorewall-init/shorewall-init.service
@@ -6,7 +6,7 @@
 [Unit]
 Description=Shorewall IPv4 firewall (bootup security)
 Before=network.target
-Conflicts=iptables.service firewalld.service
+Conflicts=iptables.service ip6tables.service firewalld.service
 
 [Service]
 Type=oneshot