diff --git a/manifests/db/sync.pp b/manifests/db/sync.pp
index 54eb2cb36..57df04e54 100644
--- a/manifests/db/sync.pp
+++ b/manifests/db/sync.pp
@@ -1,7 +1,18 @@
 #
 # Class to execute neutron dbsync
 #
-class neutron::db::sync {
+# ==Parameters
+#
+# [*extra_params*]
+#   (optional) String of extra command line parameters to append
+#   to the neutron-db-manage upgrade head command. These will be
+#   inserted in the command line between 'neutron-db-manage' and
+#   'upgrade head'.
+#   Defaults to '--config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini'
+#
+class neutron::db::sync(
+  $extra_params = '--config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini',
+) {
 
   include ::neutron::params
 
@@ -12,7 +23,7 @@ class neutron::db::sync {
   Neutron_config<| title == 'database/connection' |> ~> Exec['neutron-db-sync']
 
   exec { 'neutron-db-sync':
-    command     => 'neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini upgrade head',
+    command     => "neutron-db-manage ${extra_params} upgrade head",
     path        => '/usr/bin',
     refreshonly => true,
     logoutput   => on_failure,
diff --git a/spec/classes/neutron_db_sync_spec.rb b/spec/classes/neutron_db_sync_spec.rb
index dd6c4248f..7e796b925 100644
--- a/spec/classes/neutron_db_sync_spec.rb
+++ b/spec/classes/neutron_db_sync_spec.rb
@@ -13,6 +13,23 @@ describe 'neutron::db::sync' do
       )
     end
 
+    describe "overriding extra_params" do
+    let :params do
+      {
+        :extra_params => '--config-file /etc/neutron/neutron.conf',
+      }
+    end
+
+    it {
+        is_expected.to contain_exec('neutron-db-sync').with(
+          :command     => 'neutron-db-manage --config-file /etc/neutron/neutron.conf upgrade head',
+          :path        => '/usr/bin',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure'
+        )
+    }
+    end
+
   end
 
   context 'on a RedHat osfamily' do