diff --git a/manifests/cache.pp b/manifests/cache.pp
index e4b9fe0..f1a7373 100644
--- a/manifests/cache.pp
+++ b/manifests/cache.pp
@@ -50,6 +50,11 @@
 #   (integer value)
 #   Defaults to $facts['os_service_default']
 #
+# [*backend_expiration_time*]
+#   (Optional) Expiration time in cache backend to purge expired records
+#   automatically.
+#   Defaults to $facts['os_service_default']
+#
 # [*backend*]
 #   (Optional) Dogpile.cache backend module. It is recommended that
 #   Memcache with pooling (oslo_cache.memcache_pool) or Redis
@@ -251,6 +256,7 @@
 define oslo::cache(
   $config_prefix                        = $facts['os_service_default'],
   $expiration_time                      = $facts['os_service_default'],
+  $backend_expiration_time              = $facts['os_service_default'],
   $backend                              = $facts['os_service_default'],
   $backend_argument                     = $facts['os_service_default'],
   $proxies                              = $facts['os_service_default'],
@@ -360,6 +366,7 @@ define oslo::cache(
   $cache_options = {
     'cache/config_prefix'                        => { value => $config_prefix },
     'cache/expiration_time'                      => { value => $expiration_time },
+    'cache/backend_expiration_time'              => { value => $backend_expiration_time },
     'cache/backend'                              => { value => $backend },
     'cache/backend_argument'                     => { value => $backend_argument },
     'cache/proxies'                              => { value => join(any2array($proxies), ',') },
diff --git a/releasenotes/notes/cache-backend-expiration-time-78bd3c1ebb3ab7c5.yaml b/releasenotes/notes/cache-backend-expiration-time-78bd3c1ebb3ab7c5.yaml
new file mode 100644
index 0000000..5f3d5be
--- /dev/null
+++ b/releasenotes/notes/cache-backend-expiration-time-78bd3c1ebb3ab7c5.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``oslo::cache::backend_expiration_time`` parameter has been added.
diff --git a/spec/defines/oslo_cache_spec.rb b/spec/defines/oslo_cache_spec.rb
index 616bf91..25469dc 100644
--- a/spec/defines/oslo_cache_spec.rb
+++ b/spec/defines/oslo_cache_spec.rb
@@ -10,6 +10,7 @@ describe 'oslo::cache' do
       it 'configure oslo_cache default params' do
         is_expected.to contain_keystone_config('cache/config_prefix').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('cache/expiration_time').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_keystone_config('cache/backend_expiration_time').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('cache/backend').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('cache/backend_argument').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('cache/proxies').with_value('<SERVICE DEFAULT>')
@@ -53,7 +54,8 @@ describe 'oslo::cache' do
       let :params do
         {
           :config_prefix                        => 'cache.oslo',
-          :expiration_time                      => '600',
+          :expiration_time                      => 600,
+          :backend_expiration_time              => 700,
           :backend                              => 'dogpile.cache.null',
           :backend_argument                     => ['arg1:val1', 'arg2:val2'],
           :proxies                              => ['proxy1', 'proxy2'],
@@ -95,7 +97,8 @@ describe 'oslo::cache' do
 
       it 'configures cache section' do
         is_expected.to contain_keystone_config('cache/config_prefix').with_value('cache.oslo')
-        is_expected.to contain_keystone_config('cache/expiration_time').with_value('600')
+        is_expected.to contain_keystone_config('cache/expiration_time').with_value(600)
+        is_expected.to contain_keystone_config('cache/backend_expiration_time').with_value(700)
         is_expected.to contain_keystone_config('cache/backend').with_value('dogpile.cache.null')
         is_expected.to contain_keystone_config('cache/backend_argument').with_value(['arg1:val1', 'arg2:val2'])
         is_expected.to contain_keystone_config('cache/proxies').with_value('proxy1,proxy2')