diff --git a/mobile/src/main/java/com/github/shadowsocks/bg/LocalDnsService.kt b/mobile/src/main/java/com/github/shadowsocks/bg/LocalDnsService.kt
index b08d18ee..1d1d9644 100644
--- a/mobile/src/main/java/com/github/shadowsocks/bg/LocalDnsService.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/bg/LocalDnsService.kt
@@ -73,7 +73,8 @@ object LocalDnsService {
                         .put("MinimumTTL", 120)
                         .put("CacheSize", 4096)
                 val remoteDns = JSONArray(profile.remoteDns.split(",")
-                        .mapIndexed { i, dns -> makeDns("UserDef-" + i, dns.trim(), 9) })
+                        .mapIndexed { i, dns -> makeDns("UserDef-" + i,
+                        dns.trim() + ":53", 9) })
                 val localDns = JSONArray(arrayOf(
                         makeDns("Primary-1", "119.29.29.29:53", 3, false),
                         makeDns("Primary-2", "114.114.114.114:53", 3, false),