diff --git a/config/package_optionnal b/config/package_optionnal
index 990c4d0861..78898a9c9f 100644
--- a/config/package_optionnal
+++ b/config/package_optionnal
@@ -1,3 +1,5 @@
+arp-scan
+arp-scan-database
 collectd-mod-conntrack
 collectd-mod-cpufreq
 collectd-mod-df