diff --git a/rc.subr b/rc.subr
index 2fb44fd..e46d5de 100755
--- a/rc.subr
+++ b/rc.subr
@@ -203,6 +203,10 @@ add_vlan()
 
 add_rtadv()
 {
+    # If a card is registered for router advertisements, we should
+    # turn them on.
+    rtadvd_enable="YES"
+
     _subcard="$1"
 
     _echo "XXX ${rtadvd_interfaces} XXX"