diff --git a/defaults/rc.conf b/defaults/rc.conf
index dcf3e3c..ccb056d 100644
--- a/defaults/rc.conf
+++ b/defaults/rc.conf
@@ -23,6 +23,8 @@ rc_router_debug="NO"
 
 build_sysctl_enable="YES"
 
+clean_generated="YES"
+
 generate_internal_dhcpv4_enable='YES'
 generate_isp_dhcp_enable='YES'
 generate_rtadvd_conf_enable="YES"
diff --git a/rc.d/allow_hosts b/rc.d/allow_hosts
index ae24da4..4e5dbc4 100755
--- a/rc.d/allow_hosts
+++ b/rc.d/allow_hosts
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: allow_hosts
+# REQUIRE: clean_generated
 # REQUIRE: named
 # KEYWORD: shutdown
 #
diff --git a/rc.d/build_sysctl b/rc.d/build_sysctl
index 0b96d19..f6d016c 100755
--- a/rc.d/build_sysctl
+++ b/rc.d/build_sysctl
@@ -1,6 +1,7 @@
 #!/bin/sh
 #
 # PROVIDE: build_sysctl
+# REQUIRE: clean_generated
 # BEFORE: sysctl
 #
 
diff --git a/rc.d/clean_generated b/rc.d/clean_generated
new file mode 100755
index 0000000..ea986b0
--- /dev/null
+++ b/rc.d/clean_generated
@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# PROVIDE: clean_generated
+# KEYWORD: shutdown
+#
+
+. ${RC_ROUTER_HARNESS}/etc/rc.subr
+
+name='clean_generated'
+
+start_cmd='clean_generated_start'
+stop_cmd='clean_generated_stop'
+rcvar='clean_generated_enable'
+
+load_rc_config 'clean_generated'
+
+clean_generated_start()
+{
+	mkdir -p ${rc_router_gen_dir}
+    rm -f ${rc_router_gen_dir}/*
+}
+
+clean_generated_stop()
+{
+	true
+}
+
+################ Epilogue
+
+run_rc_command "$1"
+
+# vim: ft=bash
diff --git a/rc.d/clear_route_policy b/rc.d/clear_route_policy
index 1220ea4..f0c5069 100755
--- a/rc.d/clear_route_policy
+++ b/rc.d/clear_route_policy
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: clear_route_policy
+# REQUIRE: clean_generated
 # BEFORE: pf
 # KEYWORD: shutdown
 #
diff --git a/rc.d/generate_internal_dhcpv4 b/rc.d/generate_internal_dhcpv4
index 3ff8389..7f58746 100755
--- a/rc.d/generate_internal_dhcpv4
+++ b/rc.d/generate_internal_dhcpv4
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: generate_internal_dhcpv4
+# REQUIRE: clean_generated
 # REQUIRE: netif
 # BEFORE: dhcpd
 # KEYWORD: shutdown
diff --git a/rc.d/generate_isp_dhcp b/rc.d/generate_isp_dhcp
index 76ec30a..0502c59 100755
--- a/rc.d/generate_isp_dhcp
+++ b/rc.d/generate_isp_dhcp
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: generate_isp_dhcp
+# REQUIRE: clean_generated
 # REQUIRE: netif
 # BEFORE: dhcp6c
 # KEYWORD: shutdown
diff --git a/rc.d/generate_rtadvd_conf b/rc.d/generate_rtadvd_conf
index cb35fb1..9807957 100755
--- a/rc.d/generate_rtadvd_conf
+++ b/rc.d/generate_rtadvd_conf
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: generate_rtadvd_conf
+# REQUIRE: clean_generated
 # REQUIRE: dhcp6c
 # BEFORE: rtadvd
 # KEYWORD: shutdown
diff --git a/rc.d/generate_tayga b/rc.d/generate_tayga
index af3aeb4..225f7a1 100755
--- a/rc.d/generate_tayga
+++ b/rc.d/generate_tayga
@@ -1,6 +1,7 @@
 #!/bin/sh
 #
 # PROVIDE: generate_tayga
+# REQUIRE: clean_generated
 # REQUIRE: netif
 # BEFORE: tayga
 # KEYWORD: shutdown
diff --git a/rc.d/localnet b/rc.d/localnet
index 4656513..a421aaf 100755
--- a/rc.d/localnet
+++ b/rc.d/localnet
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: localnet
+# REQUIRE: clean_generated
 # REQUIRE: dhcp6c
 # BEFORE: named
 # KEYWORD: shutdown
diff --git a/rc.d/route_policy b/rc.d/route_policy
index d7522bd..a42e0b2 100755
--- a/rc.d/route_policy
+++ b/rc.d/route_policy
@@ -3,6 +3,7 @@
 # $FreeBSD$
 #
 # PROVIDE: route_policy
+# REQUIRE: clean_generated
 # REQUIRE: wireguard
 # KEYWORD: shutdown
 #