diff --git a/etc/ChangeLog b/etc/ChangeLog
index ba56548fdf2..4586628e296 100644
--- a/etc/ChangeLog
+++ b/etc/ChangeLog
@@ -1,3 +1,7 @@
+2011-05-24  Leo Liu  <sdl.web@gmail.com>
+
+	* NEWS: Mention the new primitive sha1 and the removal of sha1.el.
+
 2011-05-14  Ulf Jasper  <ulf.jasper@web.de>
 
 	* images/newsticker/README: Added.
diff --git a/etc/NEWS b/etc/NEWS
index 64313480efb..a4ca2961aed 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -290,6 +290,10 @@ If you need it, feedmail.el ought to provide a superset of the functionality.
 
 ** The variable `focus-follows-mouse' now always defaults to nil.
 
+** Function `sha1' is now implemented in C for speed.
+The elisp implementation sha1.el is removed. Feature sha1 is provided
+by default.
+
 
 * Editing Changes in Emacs 24.1