diff --git a/docs/releases/2.1.txt b/docs/releases/2.1.txt
index 5c4b795c02..ffd1c43572 100644
--- a/docs/releases/2.1.txt
+++ b/docs/releases/2.1.txt
@@ -236,6 +236,9 @@ Backwards incompatible changes in 2.1
 Database backend API
 --------------------
 
+This section describes changes that may be needed in third-party database
+backends.
+
 * To adhere to :pep:`249`, exceptions where a database doesn't support a
   feature are changed from :exc:`NotImplementedError` to
   :exc:`django.db.NotSupportedError`.
diff --git a/docs/releases/2.2.txt b/docs/releases/2.2.txt
index d00e2fe6f9..aa04b34f0e 100644
--- a/docs/releases/2.2.txt
+++ b/docs/releases/2.2.txt
@@ -280,6 +280,9 @@ Backwards incompatible changes in 2.2
 Database backend API
 --------------------
 
+This section describes changes that may be needed in third-party database
+backends.
+
 * Third-party database backends must implement support for table check
   constraints or set ``DatabaseFeatures.supports_table_check_constraints`` to
   ``False``.