diff --git a/modules/io/doc/mmcif.rst b/modules/io/doc/mmcif.rst
index bde82a7dcbc863ef55aa21ac37190b270c102a26..87256aa479a8ff8fa636971a7e06e50459d35f9e 100644
--- a/modules/io/doc/mmcif.rst
+++ b/modules/io/doc/mmcif.rst
@@ -140,6 +140,9 @@ of the annotation available.
     Also available as :meth:`GetMethod`. May also be modified by
     :meth:`SetMethod`.
 
+    Some PDB entries have multiple experimental methods. This function
+    only a single one of them.
+
   .. attribute:: resolution
 
     Stores the resolution of the crystal structure, obtained from the