diff --git a/ChangeLog b/ChangeLog
index 3302b429..66ea5aeb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-29  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	Prepare for the possibility of a 2.5.1 release.
+	* NEWS (2.5.1): New heading.
+
 2011-05-14  Joel E. Denny  <joeldenny@joeldenny.org>
 
 	Version 2.5.
diff --git a/NEWS b/NEWS
index f4818504..bc761162 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,8 @@
 Bison News
 ----------
 
+* Changes in version 2.5.1 (????-??-??):
+
 * Changes in version 2.5 (2011-05-14):
 
 ** Grammar symbol names can now contain non-initial dashes: