diff --git a/mobile/src/main/java/com/github/shadowsocks/QuickToggleShortcut.kt b/mobile/src/main/java/com/github/shadowsocks/QuickToggleShortcut.kt
index d60d03d0..cc496069 100644
--- a/mobile/src/main/java/com/github/shadowsocks/QuickToggleShortcut.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/QuickToggleShortcut.kt
@@ -25,7 +25,6 @@ import android.content.Intent
 import android.content.pm.ShortcutManager
 import android.os.Build
 import android.os.Bundle
-import android.os.PersistableBundle
 import android.support.v4.content.pm.ShortcutInfoCompat
 import android.support.v4.content.pm.ShortcutManagerCompat
 import android.support.v4.graphics.drawable.IconCompat
diff --git a/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt b/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
index e232a26d..03cf7642 100644
--- a/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
@@ -28,7 +28,6 @@ import android.content.Intent
 import android.content.IntentFilter
 import android.net.VpnService
 import android.os.Bundle
-import android.os.PersistableBundle
 import android.util.Log
 import com.github.shadowsocks.App.Companion.app
 import com.github.shadowsocks.aidl.IShadowsocksService