diff --git a/doc/index.rst b/doc/index.rst
index 112488b6d4..53ae6665f4 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -2,3 +2,7 @@ Account Product Module
 ######################
 
 The account product module adds accounting on product and category.
+
+.. note::
+    If the analytic account module is installed, it also adds the product and
+    category as criteria for the analytic rule engine.