diff --git a/purchase.rst b/purchase.rst
index 42118c6845..02bab15035 100644
--- a/purchase.rst
+++ b/purchase.rst
@@ -23,7 +23,7 @@ Purchase
     `Requisition </projects/modules-purchase-requisition/en/latest>`_
         Requires purchase by employees.
 
-    `Secondary Unit </projects/modules-sale-secondary-unit/en/latest>`_
+    `Secondary Unit </projects/modules-purchase-secondary-unit/en/latest>`_
         Adds a secondary unit of measure.
 
     `Shipment Cost </projects/modules-shipment-cost/en/latest>`_