Refresh arp entries in FreeBSD

In Linux, an ARP entry's age gets reset/refreshed if a packet comes by. However, it seems that FreeBSD simply sets a timer, and unconditionally evicts the ARP entry even if packets with that MAC-address/IP came by. Is there a way to get Linux's behaviour of updating the age if traffic is seen? I am experiencing large bursts of ARP broadcast traffic every 20 minutes on my LAN because of this. I know that one can change the age in FreeBSD's cache, but that just changes the intervals between bursts. I want to stop the bursts in the first place.