diff --git a/azure-mgmt-billing/azure/mgmt/billing/models/invoice.py b/azure-mgmt-billing/azure/mgmt/billing/models/invoice.py
index bd55bc268a9e..25e3930f0ce3 100644
--- a/azure-mgmt-billing/azure/mgmt/billing/models/invoice.py
+++ b/azure-mgmt-billing/azure/mgmt/billing/models/invoice.py
@@ -33,7 +33,7 @@ class Invoice(Resource):
     :ivar invoice_period_end_date: The end of the date range covered by the
      invoice.
     :vartype invoice_period_end_date: date
-    :ivar billing_period_ids: Array of billing perdiod ids that the invoice is
+    :ivar billing_period_ids: Array of billing period ids that the invoice is
      attributed to.
     :vartype billing_period_ids: list[str]
     """
diff --git a/azure-mgmt-billing/azure/mgmt/billing/models/invoice_py3.py b/azure-mgmt-billing/azure/mgmt/billing/models/invoice_py3.py
index bf69d1a66f82..9afed4eac660 100644
--- a/azure-mgmt-billing/azure/mgmt/billing/models/invoice_py3.py
+++ b/azure-mgmt-billing/azure/mgmt/billing/models/invoice_py3.py
@@ -33,7 +33,7 @@ class Invoice(Resource):
     :ivar invoice_period_end_date: The end of the date range covered by the
      invoice.
     :vartype invoice_period_end_date: date
-    :ivar billing_period_ids: Array of billing perdiod ids that the invoice is
+    :ivar billing_period_ids: Array of billing period ids that the invoice is
      attributed to.
     :vartype billing_period_ids: list[str]
     """