diff --git a/package/network/services/ppp/files/ppp.sh b/package/network/services/ppp/files/ppp.sh
index ba3b412316..b4a7467bf5 100755
--- a/package/network/services/ppp/files/ppp.sh
+++ b/package/network/services/ppp/files/ppp.sh
@@ -181,6 +181,7 @@ proto_pppoa_teardown() {
 proto_pptp_init_config() {
 	ppp_generic_init_config
 	proto_config_add_string "server"
+	proto_config_add_string "interface"
 	available=1
 	no_device=1
 }
@@ -189,10 +190,11 @@ proto_pptp_setup() {
 	local config="$1"
 	local iface="$2"
 
-	local ip serv_addr server
-	json_get_var server server && {
+	local ip serv_addr server interface
+	json_get_vars interface server
+	[ -n "$server" ] && {
 		for ip in $(resolveip -t 5 "$server"); do
-			( proto_add_host_dependency "$config" "$ip" )
+			( proto_add_host_dependency "$config" "$ip" $interface )
 			serv_addr=1
 		done
 	}