diff --git a/modules/io/doc/mmcif.rst b/modules/io/doc/mmcif.rst
index 229c54f6cc82c4bca7d1e670e63c9ea65b696958..3a725c823ceabe4036465439f8e2473e90108a92 100644
--- a/modules/io/doc/mmcif.rst
+++ b/modules/io/doc/mmcif.rst
@@ -3,7 +3,9 @@ mmCIF File Format
 
 The mmCIF file format is an alternate container for structural entities, also
 provided by the PDB. Here we describe how to load those files and how to deal
-with information provided above the common PDB format.
+with information provided above the common PDB format (:class:`MMCifInfo`,
+:class:`MMCifInfoCitation`, :class:`MMCifInfoTransOperation`,
+:class:`MMCifInfoBioUnit`, :class:`MMCifInfoStructDetails`).
 
 
 Loading mmCIF Files