diff --git a/defaults/rc.conf b/defaults/rc.conf
index b95d8b6..984de26 100644
--- a/defaults/rc.conf
+++ b/defaults/rc.conf
@@ -33,6 +33,8 @@ rc_router_gen_dir="${rc_router_conf_dir}/gen"
 
 localnet_enable='NO'
 
+rtadvd_conf_file="${rc_router_gen_dir}/rtadvd.conf"
+
 rtadvd_pltimedecr='NO'
 rtadvd_vltimedecr='NO'
 
diff --git a/rc.subr b/rc.subr
index 7798315..5320363 100755
--- a/rc.subr
+++ b/rc.subr
@@ -667,6 +667,10 @@ _rc_router_epilogue()
 {
 	max_fib=$(( ${fib_count} - 1 ))
 	rtsold_flags="${rtsold_flags} ${ipv6_isp_interfaces}"
+	if [ -n "${rtadvd_conf_file}" -a -e "${rtadvd_conf_file}" ]
+	then
+		rtadvd_flags="-c ${rtadvd_conf_file}"
+	fi
 }
 
 #. ${router_conf_dir}/pf-framework.subr