diff --git a/mobile/src/main/java/com/github/shadowsocks/App.kt b/mobile/src/main/java/com/github/shadowsocks/App.kt
index f3ddbfc5..67886b18 100644
--- a/mobile/src/main/java/com/github/shadowsocks/App.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/App.kt
@@ -137,7 +137,7 @@ class App : Application() {
 
         // handle data restored
         if (DataStore.directBootAware && UserManagerCompat.isUserUnlocked(this)) DirectBoot.update()
-        TcpFastOpen.enabled(DataStore.publicStore.getBoolean(Key.tfo, TcpFastOpen.sendEnabled))
+        TcpFastOpen.enabledAsync(DataStore.publicStore.getBoolean(Key.tfo, TcpFastOpen.sendEnabled))
         if (DataStore.publicStore.getLong(Key.assetUpdateTime, -1) != info.lastUpdateTime) {
             val assetManager = assets
             for (dir in arrayOf("acl", "overture"))
diff --git a/mobile/src/main/java/com/github/shadowsocks/utils/TcpFastOpen.kt b/mobile/src/main/java/com/github/shadowsocks/utils/TcpFastOpen.kt
index 49c2781d..b2f036ea 100644
--- a/mobile/src/main/java/com/github/shadowsocks/utils/TcpFastOpen.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/utils/TcpFastOpen.kt
@@ -52,4 +52,5 @@ object TcpFastOpen {
             "else",
             "  echo Failed.",
             "fi"), null, true)?.joinToString("\n")
+    fun enabledAsync(value: Boolean) = thread { enabled(value) }.join(1000)
 }