diff --git a/package/network/services/hostapd/files/hostapd.sh b/package/network/services/hostapd/files/hostapd.sh
index c75d140be9..e98815fb0a 100755
--- a/package/network/services/hostapd/files/hostapd.sh
+++ b/package/network/services/hostapd/files/hostapd.sh
@@ -493,11 +493,11 @@ append_hs20_conn_capab() {
 }
 
 append_radius_acct_req_attr() {
-	append bss_conf "radius_acct_req_attr=$1" "$N"
+	[ -n "$1" ] && append bss_conf "radius_acct_req_attr=$1" "$N"
 }
 
 append_radius_auth_req_attr() {
-	append bss_conf "radius_auth_req_attr=$1" "$N"
+	[ -n "$1" ] && append bss_conf "radius_auth_req_attr=$1" "$N"
 }
 
 append_airtime_sta_weight() {