diff --git a/account.rst b/account.rst
index 3c1de8a0e9..875ea72d91 100644
--- a/account.rst
+++ b/account.rst
@@ -59,6 +59,9 @@ Accounting
     `Invoice Line Standalone </projects/modules-account-invoice-line-standalone/en/latest>`_
         Supports invoice line without invoice.
 
+    `Invoice Secondary Unit </projects/modules-account-invoice-secondary-unit/en/latest>`_
+        Adds a secondary unit of measure.
+
     `Invoice Stock </projects/modules-account-invoice-stock/en/latest>`_
         Links invoice lines and stock moves.
 
diff --git a/purchase.rst b/purchase.rst
index a513af0bf7..42118c6845 100644
--- a/purchase.rst
+++ b/purchase.rst
@@ -23,5 +23,8 @@ Purchase
     `Requisition </projects/modules-purchase-requisition/en/latest>`_
         Requires purchase by employees.
 
+    `Secondary Unit </projects/modules-sale-secondary-unit/en/latest>`_
+        Adds a secondary unit of measure.
+
     `Shipment Cost </projects/modules-shipment-cost/en/latest>`_
         Computes shipment cost.
diff --git a/sale.rst b/sale.rst
index 6567f1e5d2..624869fdf4 100644
--- a/sale.rst
+++ b/sale.rst
@@ -53,6 +53,9 @@ Sale
     `Shipment Tolerance </projects/modules-sale-shipment-tolerance/en/latest>`_
         Define tolerance for under and over shipment.
 
+    `Secondary Unit </projects/modules-sale-secondary-unit/en/latest>`_
+        Adds a secondary unit of measure.
+
     `Stock Quantity </projects/modules-sale-stock-quantity/en/latest>`_
         Checks stock level.
 
diff --git a/stock.rst b/stock.rst
index c023837c49..5c2b3f6853 100644
--- a/stock.rst
+++ b/stock.rst
@@ -47,6 +47,9 @@ Stock
     `Product Location </projects/modules-stock-product-location/en/latest>`_
         Defines preferred locations for products.
 
+    `Secondary Unit </projects/modules-stock-secondary-unit/en/latest>`_
+        Adds a secondary unit of measure.
+
     `Shipment Measurements </projects/modules-stock-shipment-measurements/en/latest>`_
         Adds measurements to shipments.