diff --git a/luci-app-openmptcprouter/Makefile b/luci-app-openmptcprouter/Makefile
index 4f768cfbb..9d01246d9 100644
--- a/luci-app-openmptcprouter/Makefile
+++ b/luci-app-openmptcprouter/Makefile
@@ -11,4 +11,8 @@ PKG_LICENSE:=Apache-2.0
 
 include ../luci/luci.mk
 
+define Package/luci-app-openmptcprouter/conffiles
+/etc/sysctl.d/zzz_openmptcprouter.conf
+endef
+
 # call BuildPackage - OpenWrt buildroot signature
diff --git a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
index 5d3c5d4c5..3899a8558 100644
--- a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
+++ b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
@@ -16,7 +16,7 @@
 	    <div class="cbi-value">
 		<label class="cbi-value-title"><%:Disable IPv6%></label>
 		<div class="cbi-value-field">
-		    <input type="checkbox" name="disable_ipv6" class="cbi-input-checkbox" value="1" <% if tonumber((luci.sys.exec("sysctl net.ipv6.conf.all.disable_ipv6")):match(" %d+")) == 1 %>checked<% end %>>
+		    <input type="checkbox" name="disable_ipv6" class="cbi-input-checkbox" value="1" <% if tonumber((luci.sys.exec("sysctl net.ipv6.conf.all.disable_ipv6")):match(" %d+")) == 1 then %>checked<% end %>>
 		</div>
 	    </div>
 	</fieldset>