diff --git a/docs/releasenotes/8.2.0.rst b/docs/releasenotes/8.2.0.rst
index 28d39ca46d4..51446a0d562 100644
--- a/docs/releasenotes/8.2.0.rst
+++ b/docs/releasenotes/8.2.0.rst
@@ -13,10 +13,12 @@ when Tk/Tcl 8.5 will be the minimum supported.
 API Changes
 ===========
 
-TODO
-^^^^
+Image.alpha_composite: dest
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-TODO
+When calling ``alpha_composite()``, the ``dest`` argument now accepts negative
+co-ordinates, like the upper left corner of the ``box`` argument of ``paste()`` can be
+negative. Naturally, this has effect of cropping the overlaid image.
 
 API Additions
 =============