diff --git a/ChangeLog b/ChangeLog
index 44157230..13ef7276 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2002-09-04  Akim Demaille  <akim@epita.fr>
+
+	* configure.in: Rename as...
+	* configure.ac: this.
+	Bump to 1.49c.
+
 2002-09-04  Akim Demaille  <akim@epita.fr>
 
 	* src/assoc.c, src/closure.c, src/gram.c, src/injections.c,
diff --git a/configure.in b/configure.ac
similarity index 98%
rename from configure.in
rename to configure.ac
index 115b8671..2f6f8e95 100644
--- a/configure.in
+++ b/configure.ac
@@ -20,7 +20,7 @@
 # We need a recent Autoconf to run a recent Autotest.
 AC_PREREQ(2.53)
 
-AC_INIT([GNU Bison], [1.49b], [bug-bison@gnu.org])
+AC_INIT([GNU Bison], [1.49c], [bug-bison@gnu.org])
 AC_CONFIG_AUX_DIR(config)
 
 AM_INIT_AUTOMAKE