diff --git a/debian/DEBIAN/postinst b/debian/DEBIAN/postinst
index 4207e26..d35e2ed 100644
--- a/debian/DEBIAN/postinst
+++ b/debian/DEBIAN/postinst
@@ -17,6 +17,9 @@ set -e
 # for details, see http://www.debian.org/doc/debian-policy/ or
 # the debian-policy package
 
+# save directory
+SAVEDIR="$HOME/ms_upgrade/saved.$$";
+
 # group for users to run under
 if ! getent group mtagroup >/dev/null 2>&1; then
 	groupadd -f mtagroup >/dev/null 2>&1
diff --git a/debian/DEBIAN/preinst b/debian/DEBIAN/preinst
index 4498a9d..1a7dd0a 100644
--- a/debian/DEBIAN/preinst
+++ b/debian/DEBIAN/preinst
@@ -18,7 +18,6 @@ set -e
 
 # back up their stuff
 SAVEDIR="$HOME/ms_upgrade/saved.$$";
-export SAVEDIR
 
 if [ -f '/etc/default/mailscanner' ]; then
 	mkdir -p ${SAVEDIR}/etc/default