diff --git a/modules/io/doc/mmcif.rst b/modules/io/doc/mmcif.rst
index 22af5e694cf5224f48b539889d1379a0ccc3f280..8877bbc35b1d9802415281ab97ffe7d0dd6db6b2 100644
--- a/modules/io/doc/mmcif.rst
+++ b/modules/io/doc/mmcif.rst
@@ -122,7 +122,7 @@ of the annotation available.
 
   .. method:: GetBioUnits()
 
-    See :attr:`citations`
+    See :attr:`biounits`
 
   .. method:: SetMethod(method)