diff --git a/install_sympa.sh b/install_sympa.sh
index 08e3174..eae8f9d 100755
--- a/install_sympa.sh
+++ b/install_sympa.sh
@@ -4,7 +4,7 @@
 ## -
 _VSERVER_GUEST=no
 
-_SYMPA_VERSION=6.2.16
+#_SYMPA_VERSION=6.2.16
 
 _SYMPA_USER=sympa
 
@@ -339,11 +339,14 @@ echo "Insert version number for Sympa mailing list server."
 echo ""
 echo ""
 SYMPA_VERSION=
-echononl "Sympa version [$_SYMPA_VERSION]: "
-read SYMPA_VERSION
-if [ "X$SYMPA_VERSION" = "X" ]; then
-   SYMPA_VERSION=$_SYMPA_VERSION
-fi
+while [ "X$SYMPA_VERSION" = "X" ]; do
+   echononl "Sympa version : "
+   read SYMPA_VERSION
+   if [ "X$SYMPA_VERSION" = "X" ]; then
+      echo -e "\n\t\033[33m\033[1mA version number is required!\033[m\n"
+   fi
+done
+
 _builddir=${_srcdir}/sympa-$SYMPA_VERSION
 _logdir=${_srcdir}/log_sympa-$SYMPA_VERSION
 if $UPDATE_SYMPA ; then