diff --git a/mps/manual/source/glossary/r.rst b/mps/manual/source/glossary/r.rst
index 9f4449a930e..cbab9a255fe 100644
--- a/mps/manual/source/glossary/r.rst
+++ b/mps/manual/source/glossary/r.rst
@@ -39,7 +39,7 @@ Memory Management Glossary: R
         .. mps:specific::
 
             A value of :c:type:`mps_rank_t` indicating whether a
-            :term:`root` is :term:`ambiguous <ambiguous root>`
+            :term:`reference` is :term:`ambiguous <ambiguous root>`
             (:c:func:`mps_rank_ambig`), :term:`exact <exact root>`
             (:c:func:`mps_rank_exact`) or :term:`weak <weak root>`
             (:c:func:`mps_rank_weak`).