diff --git a/doc/rapi.rst b/doc/rapi.rst
index da703663fa76a0d8d40d147533d0719989a1033f..f9088ebfa0bf0457b2fe90729d9eb2672a780cc6 100644
--- a/doc/rapi.rst
+++ b/doc/rapi.rst
@@ -487,8 +487,8 @@ Returns a job ID. It supports the ``dry-run`` and ``force`` arguments.
 
 Body parameters:
 
-``nodes`` (list, required)
-  One or more nodes to assign to the group.
+.. opcode_params:: OP_GROUP_ASSIGN_NODES
+   :exclude: group_name, force, dry_run
 
 
 ``/2/instances``