diff --git a/.prev-version b/.prev-version
index ec1cf33c..2714f531 100644
--- a/.prev-version
+++ b/.prev-version
@@ -1 +1 @@
-2.6.3
+2.6.4
diff --git a/NEWS b/NEWS
index 87d4173e..895f55db 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 GNU Bison NEWS
 
+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+
 * Noteworthy changes in release 2.6.4 (2012-10-23) [stable]
 
   Bison 2.6.3's --version was incorrect.  This release fixes this issue.