diff --git a/queue_job/readme/USAGE.rst b/queue_job/readme/USAGE.rst
index 6c472eccf9..b595a9c595 100644
--- a/queue_job/readme/USAGE.rst
+++ b/queue_job/readme/USAGE.rst
@@ -43,6 +43,13 @@ they have different xmlids. On uninstall, the merged record is deleted when all
 the modules using it are uninstalled.
 
 
+**Job function: model**
+
+If the function is defined in an abstract model, you can not write
+``<field name="model_id" ref="xml_id_of_the_abstract_model"</field>``
+but you have to define a function for each model that inherits from the abstract model.
+
+
 **Job function: channel**
 
 The channel where the job will be delayed. The default channel is ``root``.