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-rw-r--r--docs/users_guide/glasgow_exts.xml3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index e3c0e73dba..1923a7f8a8 100644
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -5314,7 +5314,8 @@ Sum k1 k2 :: BOX
L :: k1 -> Sum k1 k2
R :: k2 -> Sum k1 k2
</programlisting>
-Note that <literal>List</literal>, for instance, does not get kind
+where <literal>BOX</literal> is the (unique) sort that classifies kinds.
+Note that <literal>List</literal>, for instance, does not get sort
<literal>BOX -> BOX</literal>, because we do not further classify kinds; all
kinds have sort <literal>BOX</literal>.
</para>