diff --git a/dhclient-script b/dhclient-script
index cedae26..41fd26f 100644
--- a/dhclient-script
+++ b/dhclient-script
@@ -110,6 +110,7 @@ make_resolv_conf() {
        [ -n "${new_domain_name_servers}" ] ||
        [ -n "${new_domain_search}" ]; then
         rscf="$(mktemp ${TMPDIR:-/tmp}/XXXXXX)"
+        [[ -z "${rscf}" ]] && return
         echo "; generated by /usr/sbin/dhclient-script" > ${rscf}
 
         if [ -n "${SEARCH}" ]; then
@@ -149,6 +150,7 @@ make_resolv_conf() {
     elif [ -n "${new_dhcp6_name_servers}" ] ||
          [ -n "${new_dhcp6_domain_search}" ]; then
         rscf="$(mktemp ${TMPDIR:-/tmp}/XXXXXX)"
+        [[ -z "${rscf}" ]] && return
         echo "; generated by /usr/sbin/dhclient-script" > ${rscf}
 
         if [ -n "${SEARCH}" ]; then