diff --git a/doc/rados/configuration/osd-config-ref.rst b/doc/rados/configuration/osd-config-ref.rst
index 3c3a766f027..1691bc0f4bd 100644
--- a/doc/rados/configuration/osd-config-ref.rst
+++ b/doc/rados/configuration/osd-config-ref.rst
@@ -91,6 +91,7 @@ that Ceph uses the entire partition for the journal.
 
 
 .. index:: OSD; file system
+
 File System Settings
 ====================
 Ceph builds and mounts file systems which are used for Ceph OSDs.