diff --git a/manifests/proxy/ceilometer.pp b/manifests/proxy/ceilometer.pp
index d2a66422..a30f045f 100644
--- a/manifests/proxy/ceilometer.pp
+++ b/manifests/proxy/ceilometer.pp
@@ -213,7 +213,7 @@ class swift::proxy::ceilometer(
     'filter:ceilometer/control_exchange':     value => $control_exchange;
     'filter:ceilometer/paste.filter_factory': value => 'ceilometermiddleware.swift:filter_factory';
     'filter:ceilometer/nonblocking_notify':   value => $nonblocking_notify;
-    'filter:ceilometer/ignore_projects':      value => $ignore_projects;
+    'filter:ceilometer/ignore_projects':      value => join(any2array($ignore_projects), ',');
     'filter:ceilometer/auth_url':             value => $auth_url;
     'filter:ceilometer/auth_type':            value => $auth_type;
     'filter:ceilometer/project_name':         value => $project_name_real;
diff --git a/spec/classes/swift_proxy_ceilometer_spec.rb b/spec/classes/swift_proxy_ceilometer_spec.rb
index 4dbb2f44..24424172 100644
--- a/spec/classes/swift_proxy_ceilometer_spec.rb
+++ b/spec/classes/swift_proxy_ceilometer_spec.rb
@@ -46,7 +46,7 @@ describe 'swift::proxy::ceilometer' do
           :topic                 => 'notifications',
           :control_exchange      => 'swift',
           :nonblocking_notify    => true,
-          :ignore_projects       => ['services'],
+          :ignore_projects       => ['services', 'admin'],
           :auth_url              => 'http://127.0.0.1:5000',
           :auth_type             => 'password',
           :project_domain_name   => 'Default',
@@ -64,7 +64,7 @@ describe 'swift::proxy::ceilometer' do
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/topic').with_value('notifications') }
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/control_exchange').with_value('swift') }
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/nonblocking_notify').with_value('true') }
-        it { is_expected.to contain_swift_proxy_config('filter:ceilometer/ignore_projects').with_value(['services']) }
+        it { is_expected.to contain_swift_proxy_config('filter:ceilometer/ignore_projects').with_value('services,admin') }
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/auth_url').with_value('http://127.0.0.1:5000') }
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/auth_type').with_value('password') }
         it { is_expected.to contain_swift_proxy_config('filter:ceilometer/project_name').with_value('services') }