diff --git a/source/limitations-upcoming.txt b/source/limitations-upcoming.txt
index 1707f70..c11bb42 100644
--- a/source/limitations-upcoming.txt
+++ b/source/limitations-upcoming.txt
@@ -123,6 +123,7 @@ The following field types are unavailable in {+django-odm+}:
 
 - ``GeneratedField``
 - ``AutoField`` (including ``BigAutoField`` and ``SmallAutoField``)
+- ``CompositePrimaryKey``
 
 .. _django-limitations-query: