diff --git a/install_postfixadmin.sh b/install_postfixadmin.sh
index 504a714..a6a9e5e 100755
--- a/install_postfixadmin.sh
+++ b/install_postfixadmin.sh
@@ -1550,7 +1550,7 @@ fi
 
 echononl "\tCopy vacation script to '/var/spool/vacation/vacation.pl'"
 _vacation_script="$(find ${_src_base_dir}/postfixadmin-${PF_ADMIN_VERSION} -type f -name vacation.pl -print 2>/dev/null)"
-if [[ -z "$(trim "$_vacation_script")" ]] ; then
+if [[ -n "$(trim "$_vacation_script")" ]] ; then
    cp -a ${_vacation_script} /var/spool/vacation/ > "$log_file" 2>&1
    if [[ $? -eq 0 ]];then
       echo_ok