diff --git a/luci-app-mosdns/Makefile b/luci-app-mosdns/Makefile
index f1d59cc..902763b 100644
--- a/luci-app-mosdns/Makefile
+++ b/luci-app-mosdns/Makefile
@@ -17,6 +17,7 @@ endef
 
 define Package/$(PKG_NAME)/postinst
 #!/bin/sh
+[ ! -f /etc/openwrt_release ] && exit 0
 [ -n "${IPKG_INSTROOT}" ] || {
 	sysctl -p /etc/sysctl.d/20-mosdns-buffer-increase.conf
 	exit 0
diff --git a/luci-app-mosdns/root/etc/init.d/mosdns b/luci-app-mosdns/root/etc/init.d/mosdns
index 5c00c7b..2bece2a 100755
--- a/luci-app-mosdns/root/etc/init.d/mosdns
+++ b/luci-app-mosdns/root/etc/init.d/mosdns
@@ -20,6 +20,8 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 
+[ ! -f /etc/openwrt_release ] && exit 0
+
 START=99
 USE_PROCD=1