diff --git a/install/alternc.install b/install/alternc.install
index 89211c21..d75a5553 100644
--- a/install/alternc.install
+++ b/install/alternc.install
@@ -90,7 +90,7 @@ INSTALLED_CONFIG_TAR="/var/lib/alternc/backups/etc-installed.tar.gz"
 if [ -f "$INSTALLED_CONFIG_TAR" ]; then
     CHANGED="`env LANG=C tar -zdf "$INSTALLED_CONFIG_TAR" -C / 2> /dev/null | 
               grep -v 'postfix/main.cf' | grep -v 'Uid differs'|grep -v 'Gid differs'  |grep -v 'Mode differs' | 
-              sed -e 's/^\([^:]*\).*/    \1/' | sort -u`"
+              sed -e 's#^\([^:]*\).*#    /\1#' | sort -u`"
     if [ ! -z "$CHANGED" ]; then
         echo "The following configuration files has changed since last AlternC"
         echo "installation :"