diff --git a/bin/migration_scripts/titanium2vanadium.sh b/bin/migration_scripts/titanium2vanadium.sh
new file mode 100755
index 0000000000000000000000000000000000000000..6c374f21283c22e97e1a8f938ce007e4130f3a12
--- /dev/null
+++ b/bin/migration_scripts/titanium2vanadium.sh
@@ -0,0 +1,164 @@
+#! /bin/sh
+##########################################################################
+#                                                                        #
+#  This file is part of Frama-C.                                         #
+#                                                                        #
+#  Copyright (C) 2007-2020                                               #
+#    CEA (Commissariat à l'énergie atomique et aux énergies              #
+#         alternatives)                                                  #
+#                                                                        #
+#  you can redistribute it and/or modify it under the terms of the GNU   #
+#  Lesser General Public License as published by the Free Software       #
+#  Foundation, version 2.1.                                              #
+#                                                                        #
+#  It is distributed in the hope that it will be useful,                 #
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of        #
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         #
+#  GNU Lesser General Public License for more details.                   #
+#                                                                        #
+#  See the GNU Lesser General Public License version 2.1                 #
+#  for more details (enclosed in the file licenses/LGPLv2.1).            #
+#                                                                        #
+##########################################################################
+
+#
+# Converts a Frama-C plugin from Frama-C 22 Titanium to Frama-C 23 Vanadium,
+# on a best-efforts basis (no guarantee that the result is fully compatible).
+#
+# known missing features:
+# - doesn't work if a directory name contains spaces
+# - doesn't follow symbolic links to directories
+
+ARGS=$@
+
+DIR=
+
+# verbosing on by default
+VERBOSE="v"
+
+sedi ()
+{
+  if [ -n "`sed --help 2> /dev/null | grep \"\\-i\" 2> /dev/null`" ]; then
+    sed -i "$@"
+  else
+      # option '-i' is not recognized by sed: use a tmp file
+    new_temp=`mktemp /tmp/frama-c.XXXXXXX` || exit 1
+    sed "$@" > $new_temp
+    eval last=\${$#}
+    mv $new_temp $last
+  fi
+}
+
+dirs ()
+{
+  if [ -z "$DIR" ]; then
+    DIR=.
+  fi
+}
+
+safe_goto ()
+{
+  dir=$1
+  cd $dir
+  $3
+  cd $2
+}
+
+goto ()
+{
+  if [ -d $1 ]; then
+    safe_goto $1 $2 $3
+  else
+    echo "Directory '$1' does not exist. Omitted."
+  fi
+}
+
+process_file ()
+{
+  file=$1
+  if [ "$VERBOSE" ]; then
+    echo "Processing file $file"
+  fi
+  sedi \
+   -e 's/Cil\.Frama_c_builtins/Cil_builtins.Frama_c_builtins/g' \
+   -e 's/Cil\.is_builtin/Cil_builtins.is_builtin/g' \
+   -e 's/Cil\.is_unused_builtin/Cil_builtins.is_unused_builtin/g' \
+   -e 's/Cil\.is_special_builtin/Cil_builtins.is_special_builtin/g' \
+   -e 's/Cil\.add_special_builtin/Cil_builtins.add_special_builtin/g' \
+   -e 's/Cil\.add_special_builtin_family/Cil_builtins.add_special_builtin_family/g' \
+   -e 's/Cil\.init_builtins/Cil_builtins.init_builtins/g' \
+   -e 's/Cil\.Builtin_functions/Cil_builtins.Builtin_functions/g' \
+   -e 's/Cil\.builtinLoc/Cil_builtins.builtinLoc/g' \
+   $file
+}
+
+apply_one_dir ()
+{
+  if [ "$VERBOSE" ]; then
+    echo "Processing directory `pwd`"
+  fi
+  for f in `ls -p1 *.ml* 2> /dev/null`; do
+    process_file $f
+  done
+}
+
+apply_recursively ()
+{
+  apply_one_dir
+  for d in `ls -p1 | grep \/`; do
+    safe_goto $d .. apply_recursively
+  done
+}
+
+applying_to_list ()
+{
+  dirs
+  tmpdir=`pwd`
+  for d in $DIR; do
+    goto $d $tmpdir $1
+  done
+}
+
+help ()
+{
+  echo "Usage: $0 [options | directories]
+
+Options are:
+  -r | --recursive       Check subdirectories recursively
+  -h | --help            Display help message
+  -q | --quiet           Quiet mode (i.e. non-verbose mode)
+  -v | --verbose         Verbose mode (default)"
+  exit 0
+}
+
+error ()
+{
+  echo "$1.
+Do \"$0 -h\" for help."
+  exit 1
+}
+
+FN="apply_one_dir"
+
+parse_arg ()
+{
+  case $1 in
+    -r | --recursive)     FN="apply_recursively";;
+    -h | -help      )     help; exit 0;;
+    -q | --quiet    )     VERBOSE=;;
+    -v | --verbose  )     VERBOSE="v";;
+    -* )                  error "Invalid option $1";;
+    * )                   DIR="$DIR $1";;
+  esac
+}
+
+cmd_line ()
+{
+  for s in $ARGS; do
+    parse_arg $s
+  done
+  applying_to_list $FN
+}
+
+cmd_line
+exit 0
diff --git a/headers/header_spec.txt b/headers/header_spec.txt
index 3b8202ed0b9b9aede788497ef1b7e4c9a8f80bb1..d52363f4281bd136fe28d7872fbaf083cd1f9b7c 100644
--- a/headers/header_spec.txt
+++ b/headers/header_spec.txt
@@ -41,6 +41,7 @@ bin/migration_scripts/sodium2magnesium.sh: CEA_LGPL
 bin/migration_scripts/sulfur2chlorine.sh: CEA_LGPL
 bin/migration_scripts/chlorine2argon.sh: CEA_LGPL
 bin/migration_scripts/potassium2calcium.sh: CEA_LGPL
+bin/migration_scripts/titanium2vanadium.sh: CEA_LGPL
 bin/sed_get_binutils_version: .ignore
 bin/sed_get_make_major: .ignore
 bin/sed_get_make_minor: .ignore