diff --git a/vars/redhat-7.yml b/vars/redhat-7.yml
index 7ca286c4..6f7533d7 100644
--- a/vars/redhat-7.yml
+++ b/vars/redhat-7.yml
@@ -43,6 +43,7 @@ openstack_host_kernel_modules:
   - name: iscsi_tcp
   - name: nf_conntrack
   - name: nf_conntrack_ipv4
+  - name: nf_conntrack_ipv6
   - name: nf_defrag_ipv4
   - name: nf_nat
   - name: nf_nat_ipv4
diff --git a/vars/suse-42.yml b/vars/suse-42.yml
index b7076abe..4c4ed905 100644
--- a/vars/suse-42.yml
+++ b/vars/suse-42.yml
@@ -46,6 +46,7 @@ openstack_host_kernel_modules:
   - name: iscsi_tcp
   - name: nf_conntrack
   - name: nf_conntrack_ipv4
+  - name: nf_conntrack_ipv6
   - name: nf_defrag_ipv4
   - name: nf_nat
   - name: nf_nat_ipv4
diff --git a/vars/ubuntu-16.04.yml b/vars/ubuntu-16.04.yml
index 11409e7e..4ba31f3a 100644
--- a/vars/ubuntu-16.04.yml
+++ b/vars/ubuntu-16.04.yml
@@ -43,6 +43,7 @@ openstack_host_kernel_modules:
   - name: nbd
   - name: nf_conntrack
   - name: nf_conntrack_ipv4
+  - name: nf_conntrack_ipv6
   - name: nf_defrag_ipv4
   - name: nf_nat
   - name: nf_nat_ipv4