diff --git a/manifests/init.pp b/manifests/init.pp
index a1aec1d7..9b77f58f 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -619,7 +619,7 @@ class horizon(
   Hash $keystone_options                            = {},
   Hash $neutron_options                             = {},
   Hash $instance_options                            = {},
-  $use_simple_tenant_usage                          = undef,
+  Boolean $use_simple_tenant_usage                  = false,
   Stdlib::Absolutepath $file_upload_temp_dir        = '/tmp',
   Optional[Stdlib::Absolutepath] $policy_files_path = undef,
   Optional[Hash[String, String]] $policy_files      = undef,
diff --git a/releasenotes/notes/require-boolean-for-use_simple_tenant_usage-206a3e399976fd9d.yaml b/releasenotes/notes/require-boolean-for-use_simple_tenant_usage-206a3e399976fd9d.yaml
new file mode 100644
index 00000000..573c043e
--- /dev/null
+++ b/releasenotes/notes/require-boolean-for-use_simple_tenant_usage-206a3e399976fd9d.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The ``horizon::use_simple_tenant_usage`` parameter now requires a boolean
+    value.
diff --git a/templates/local_settings.py.erb b/templates/local_settings.py.erb
index 767e9b1d..099ad445 100644
--- a/templates/local_settings.py.erb
+++ b/templates/local_settings.py.erb
@@ -429,8 +429,8 @@ OPENSTACK_ENABLE_PASSWORD_RETRIEVE = True
 # SimpleTenantUsage can cause performance issues in the nova API in larger
 # deployments. Try to set this to ``False`` for such cases.
 #OPENSTACK_USE_SIMPLE_TENANT_USAGE = True
-<% if ! (@use_simple_tenant_usage.nil?) -%>
-OPENSTACK_USE_SIMPLE_TENANT_USAGE = <%= @use_simple_tenant_usage.to_s.capitalize %>
+<% if ! @use_simple_tenant_usage -%>
+OPENSTACK_USE_SIMPLE_TENANT_USAGE = False
 <% end -%>
 
 # The Xen Hypervisor has the ability to set the mount point for volumes