diff --git a/doc/rados/configuration/osd-config-ref.rst b/doc/rados/configuration/osd-config-ref.rst
index fae7078930b..8e3c4f3554a 100644
--- a/doc/rados/configuration/osd-config-ref.rst
+++ b/doc/rados/configuration/osd-config-ref.rst
@@ -76,6 +76,12 @@ that Ceph uses the entire partition for the journal.
 :Default: ``90``
 
 
+``osd max object size``
+:Description: The maximum size of a RADOS object in bytes.
+:Type: 32-bit Unsigned Integer
+:Default: 128MB
+
+
 ``osd client message size cap`` 
 
 :Description: The largest client data message allowed in memory.