diff --git a/tinc-up b/tinc-up
index a860bc2..a1c78bb 100755
--- a/tinc-up
+++ b/tinc-up
@@ -75,7 +75,13 @@ start_dhclient() {
     dhclient -x
     dhclient -nw "$interface"
   elif [[ "$OSTYPE" == "freebsd"* ]]; then
-    dhclient -b "$interface"
+    # prefer isc-dhcp-client as it supports dhcpv6
+    if [[ -x /usr/local/sbin/dhclient ]]; then
+      /usr/local/sbin/dhclient -x
+      /usr/local/sbin/dhclient -nw "$interface"
+    else
+      dhclient -b "$interface"
+    fi
   else
     nohup setsid dhclient "$interface" >/dev/null 2>&1
   fi