diff --git a/modules/io/doc/mmcif.rst b/modules/io/doc/mmcif.rst
index 924065a11323616a5466429d32b8be6aecdef7b6..9fc89178e221eeb0134a5d61dd42e43e78f59909 100644
--- a/modules/io/doc/mmcif.rst
+++ b/modules/io/doc/mmcif.rst
@@ -1250,7 +1250,7 @@ of the annotation available.
 
     Get a list of chain names which contain branched entities.
 
-    :returns: :class:`list` od :class:`str`
+    :returns: :class:`list` of :class:`str`
 
   .. method:: GetAtom1