diff --git a/manifests/auth_file.pp b/manifests/auth_file.pp
index 6f697f1..a8e1343 100644
--- a/manifests/auth_file.pp
+++ b/manifests/auth_file.pp
@@ -28,10 +28,6 @@
 #   (Optional) Username for this account as defined in keystone
 #   Defaults to 'admin'.
 #
-# [*tenant_name*]
-#   (Optional) Tenant for this account as defined in keystone
-#   Defaults to undef.
-#
 # [*project_name*]
 #   (Optional) Project for this account as defined in keystone
 #   Use instead of tenant_name for when using identity v3.
@@ -127,13 +123,16 @@
 #   (Optional) User domain in v3 api.
 #   Defaults to 'Default'.
 #
+# [*tenant_name*]
+#   (Optional) Tenant for this account as defined in keystone
+#   Defaults to undef.
+#
 class openstack_extras::auth_file (
   $password,
   $auth_url               = 'http://127.0.0.1:5000/v3/',
   $service_token          = undef,
   $service_endpoint       = 'http://127.0.0.1:5000/v3/',
   $username               = 'admin',
-  $tenant_name            = undef,
   $project_name           = 'openstack',
   $region_name            = 'RegionOne',
   $use_no_cache           = true,
@@ -158,6 +157,7 @@ class openstack_extras::auth_file (
   # DEPRECATED PARAMETERS
   $project_domain         = undef,
   $user_domain            = undef,
+  $tenant_name            = undef,
 ) {
 
   if $project_domain != undef {
@@ -176,6 +176,11 @@ Use user_domain_name instead')
     $user_domain_name_real = $user_domain_name
   }
 
+  if $tenant_name != undef {
+    warning('tenant_name is deprecated and will be removed in a future release. \
+Use project_name instead')
+  }
+
   file { $path:
     owner     => 'root',
     group     => 'root',
diff --git a/releasenotes/notes/deprecate-tenant_name-d8feb61192e129f7.yaml b/releasenotes/notes/deprecate-tenant_name-d8feb61192e129f7.yaml
new file mode 100644
index 0000000..091a5d4
--- /dev/null
+++ b/releasenotes/notes/deprecate-tenant_name-d8feb61192e129f7.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The ``openstack_extras::auth_file::tenant_name`` parameter has been
+    deprecated. Use the ``project_name`` parameter instead.