diff --git a/manifests/init.pp b/manifests/init.pp
index 645fb1ee..a4b485a9 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -776,7 +776,7 @@ class horizon (
   if $compress_offline {
     if $facts['os']['family'] == 'Debian' {
       exec { 'refresh_horizon_django_compress':
-        command     => "${horizon::params::manage_py} compress --force",
+        command     => [$horizon::params::manage_py, 'compress', '--force'],
         refreshonly => true,
         tag         => ['horizon-compress'],
       }
diff --git a/spec/classes/horizon_init_spec.rb b/spec/classes/horizon_init_spec.rb
index bdfb2a78..66fdc730 100644
--- a/spec/classes/horizon_init_spec.rb
+++ b/spec/classes/horizon_init_spec.rb
@@ -790,7 +790,7 @@ describe 'horizon' do
   shared_examples_for 'horizon on Debian' do
     it 'refreshes horizon django cache' do
       is_expected.to contain_exec('refresh_horizon_django_compress').with({
-        :command     => '/usr/share/openstack-dashboard/manage.py compress --force',
+        :command     => ['/usr/share/openstack-dashboard/manage.py', 'compress', '--force'],
         :refreshonly => true,
       })
       is_expected.to contain_concat(platforms_params[:config_file]).that_notifies('Exec[refresh_horizon_django_compress]')