diff --git a/ChangeLog b/ChangeLog
index ea50c149e..80f8076e1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-07-23  Alexandre Duret-Lutz  <adl@src.lip6.fr>
+
+	* NEWS, configure.in: Bump version to 0.4a.
+
 2007-07-17  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
 	* NEWS, configure.in: Bump version to 0.4.
diff --git a/NEWS b/NEWS
index 49ec188c3..ed21d5d2f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,5 @@
+New in spot 0.4a:
+
 New in spot 0.4 (2007-07-17):
 
   * Upgrade to Autoconf 2.61, Automake 1.10, Bison 2.3, and Swig 1.3.31.
diff --git a/configure.ac b/configure.ac
index a2bca2c77..c19b60d94 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@
 # 02111-1307, USA.
 
 AC_PREREQ([2.61])
-AC_INIT([spot], [0.4])
+AC_INIT([spot], [0.4a])
 AC_CONFIG_AUX_DIR([tools])
 AM_INIT_AUTOMAKE([1.10 gnits nostdinc tar-ustar])