diff --git a/nova/files/liberty/nova-compute.conf.Debian b/nova/files/liberty/nova-compute.conf.Debian
index 09b73fa..0a0047c 100644
--- a/nova/files/liberty/nova-compute.conf.Debian
+++ b/nova/files/liberty/nova-compute.conf.Debian
@@ -16,11 +16,11 @@
 api_paste_config=/etc/nova/api-paste.ini
 volumes_path=/var/lib/nova/volumes
 enabled_apis=ec2,osapi_compute,metadata
-
+{%- if controller.sriov is defined %}
 {%- for nic_name, sriov in compute.sriov.iteritems() %}
 pci_passthrough_whitelist = {"devname":"{{ sriov.devname }}","physical_network":"{{ sriov.physical_network }}"}
 {%- endfor %}
-
+{%- endif %}
 {%- if compute.image.use_cow is defined %}
 use_cow_images = {{ compute.image.use_cow }}
 {%- endif %}
diff --git a/nova/files/liberty/nova-controller.conf.Debian b/nova/files/liberty/nova-controller.conf.Debian
index 4aebb27..302a8c1 100644
--- a/nova/files/liberty/nova-controller.conf.Debian
+++ b/nova/files/liberty/nova-controller.conf.Debian
@@ -23,7 +23,7 @@
 ram_allocation_ratio = {{ controller.ram_allocation_ratio }}
 disk_allocation_ratio = {{ controller.disk_allocation_ratio }}
 scheduler_default_filters = {{ controller.scheduler_default_filters }}
-{%- if controller.sriov %}
+{%- if controller.sriov is defined %}
 scheduler_available_filters = nova.scheduler.filters.all_filters
 scheduler_available_filters = nova.scheduler.filters.pci_passthrough_filter.PciPassthroughFilter
 {%- endif %}
diff --git a/nova/files/mitaka/nova-compute.conf.Debian b/nova/files/mitaka/nova-compute.conf.Debian
index ee3dbbb..69fa872 100644
--- a/nova/files/mitaka/nova-compute.conf.Debian
+++ b/nova/files/mitaka/nova-compute.conf.Debian
@@ -18,11 +18,11 @@
 vif_plugging_is_fatal=True
 vif_plugging_timeout=300
 dhcp_domain={{ compute.get('dhcp_domain', 'novalocal') }}
-
+{%- if controller.sriov is defined %}
 {%- for nic_name, sriov in compute.sriov.iteritems() %}
 pci_passthrough_whitelist = {"devname":"{{ sriov.devname }}","physical_network":"{{ sriov.physical_network }}"}
 {%- endfor %}
-
+{%- endif %}
 {%- if compute.image.use_cow is defined %}
 use_cow_images = {{ compute.image.use_cow }}
 {%- endif %}
diff --git a/nova/files/mitaka/nova-controller.conf.Debian b/nova/files/mitaka/nova-controller.conf.Debian
index bf681db..0773c6d 100644
--- a/nova/files/mitaka/nova-controller.conf.Debian
+++ b/nova/files/mitaka/nova-controller.conf.Debian
@@ -20,7 +20,7 @@
 ram_allocation_ratio = {{ controller.ram_allocation_ratio }}
 disk_allocation_ratio = {{ controller.disk_allocation_ratio }}
 scheduler_default_filters = {{ controller.scheduler_default_filters }}
-{%- if controller.sriov %}
+{%- if controller.sriov is defined %}
 scheduler_available_filters = nova.scheduler.filters.all_filters
 scheduler_available_filters = nova.scheduler.filters.pci_passthrough_filter.PciPassthroughFilter
 {%- endif %}