diff --git a/manifests/compute.pp b/manifests/compute.pp
index cf6ecf350..d5bc60e9d 100644
--- a/manifests/compute.pp
+++ b/manifests/compute.pp
@@ -48,6 +48,9 @@
 #   (optional) Whether to use Neutron for networking of VMs
 #   Defaults to true
 #
+# [*network_device_mtu*]
+#   (optional) The MTU size for the interfaces managed by nova
+#   Defaults to undef
 #
 class nova::compute (
   $enabled                       = false,
@@ -60,7 +63,8 @@ class nova::compute (
   $vncproxy_path                 = '/vnc_auto.html',
   $force_config_drive            = false,
   $virtio_nic                    = false,
-  $neutron_enabled               = true
+  $neutron_enabled               = true,
+  $network_device_mtu            = undef
 ) {
 
   include nova::params
@@ -107,6 +111,16 @@ class nova::compute (
     nova_config { 'DEFAULT/libvirt_use_virtio_for_bridges': value => true }
   }
 
+  if $network_device_mtu {
+    nova_config {
+      'DEFAULT/network_device_mtu':   value => $network_device_mtu;
+    }
+  } else {
+    nova_config {
+      'DEFAULT/network_device_mtu':   ensure => absent;
+    }
+  }
+
   package { 'pm-utils':
     ensure => present,
   }
diff --git a/spec/classes/nova_compute_spec.rb b/spec/classes/nova_compute_spec.rb
index fbd463f90..2aea5ef38 100644
--- a/spec/classes/nova_compute_spec.rb
+++ b/spec/classes/nova_compute_spec.rb
@@ -26,6 +26,8 @@ describe 'nova::compute' do
         'http://127.0.0.1:6080/vnc_auto.html'
       ) }
 
+      it { should contain_nova_config('DEFAULT/network_device_mtu').with('ensure' => 'absent') }
+
       it { should contain_service('nova-compute').with(
         'name'      => 'nova-compute',
         'ensure'    => 'stopped',
@@ -78,6 +80,15 @@ describe 'nova::compute' do
 
         it { should contain_nova_config('DEFAULT/force_config_drive').with_value('true') }
 
+      end
+      describe 'with network_device_mtu specified' do
+
+        let :params do
+          {:network_device_mtu => 9999}
+        end
+
+        it { should contain_nova_config('DEFAULT/network_device_mtu').with_value('9999') }
+
       end
       describe 'with package version' do
         let :params do