diff --git a/msvc/Makefile b/msvc/Makefile
index 2042df80b..2c30256c1 100755
--- a/msvc/Makefile
+++ b/msvc/Makefile
@@ -10,8 +10,8 @@ srcdir	= ..\src
 
 SHORT_SITE_NAME   =
 LONG_SITE_NAME    =
-ECL_VERSION       = 9.11.1
-ECL_VERSION_NUMBER= 91101
+ECL_VERSION       = 9.12.1
+ECL_VERSION_NUMBER= 91201
 ARCHITECTURE      = PENTIUM4
 SOFTWARE_TYPE     = NT
 SOFTWARE_VERSION  = 5.0
diff --git a/src/CHANGELOG b/src/CHANGELOG
index 6e82e54f3..0fa72daff 100755
--- a/src/CHANGELOG
+++ b/src/CHANGELOG
@@ -1,4 +1,4 @@
-ECL 9.11.1:
+ECL 9.12.1:
 ===========
 
 * Visible changes:
diff --git a/src/configure b/src/configure
index fb784c483..b6db13399 100755
--- a/src/configure
+++ b/src/configure
@@ -1,7 +1,7 @@
 #! /bin/sh
 # From configure.in Revision.
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.63 for ecl 9.11.1.
+# Generated by GNU Autoconf 2.63 for ecl 9.12.1.
 #
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
 # 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
@@ -595,8 +595,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='ecl'
 PACKAGE_TARNAME='ecl'
-PACKAGE_VERSION='9.11.1'
-PACKAGE_STRING='ecl 9.11.1'
+PACKAGE_VERSION='9.12.1'
+PACKAGE_STRING='ecl 9.12.1'
 PACKAGE_BUGREPORT=''
 
 ac_unique_file="bare.lsp.in"
@@ -1370,7 +1370,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures ecl 9.11.1 to adapt to many kinds of systems.
+\`configure' configures ecl 9.12.1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1439,7 +1439,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of ecl 9.11.1:";;
+     short | recursive ) echo "Configuration of ecl 9.12.1:";;
    esac
   cat <<\_ACEOF
 
@@ -1596,7 +1596,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-ecl configure 9.11.1
+ecl configure 9.12.1
 generated by GNU Autoconf 2.63
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1610,7 +1610,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by ecl $as_me 9.11.1, which was
+It was created by ecl $as_me 9.12.1, which was
 generated by GNU Autoconf 2.63.  Invocation command line was
 
   $ $0 $@
@@ -14528,7 +14528,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by ecl $as_me 9.11.1, which was
+This file was extended by ecl $as_me 9.12.1, which was
 generated by GNU Autoconf 2.63.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -14587,7 +14587,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_version="\\
-ecl config.status 9.11.1
+ecl config.status 9.12.1
 configured by $0, generated by GNU Autoconf 2.63,
   with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/src/configure.in b/src/configure.in
index d669e4f17..7da766286 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -8,7 +8,7 @@ dnl  AUTOCONF configuration for ECL
 dnl  Giuseppe Attardi 25.1.1994
 dnl
 
-AC_INIT([ecl],[9.11.1],[])
+AC_INIT([ecl],[9.12.1],[])
 AC_REVISION([$Revision$])
 AC_CONFIG_SRCDIR([bare.lsp.in])
 AC_CONFIG_AUX_DIR([${srcdir}/gmp])