diff --git a/src/main/java/com/topjohnwu/magisk/MagiskFragment.java b/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
index a56a7b5c9..14c743c64 100644
--- a/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
+++ b/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
@@ -7,6 +7,7 @@ import android.support.annotation.Nullable;
 import android.support.annotation.StringRes;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.widget.CardView;
+import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -92,7 +93,14 @@ public class MagiskFragment extends Fragment
             new CheckSafetyNet(getActivity()).exec();
             collapse();
         };
-        if (!CheckSafetyNet.dexPath.exists()) {
+        if (!TextUtils.equals(mm.getPackageName(), Const.ORIG_PKG_NAME)) {
+            new AlertDialogBuilder(getActivity())
+                    .setTitle(R.string.cannot_check_sn_title)
+                    .setMessage(R.string.cannot_check_sn_notice)
+                    .setCancelable(true)
+                    .setPositiveButton(R.string.ok, null)
+                    .show();
+        } else if (!CheckSafetyNet.dexPath.exists()) {
             // Show dialog
             new AlertDialogBuilder(getActivity())
                     .setTitle(R.string.proprietary_title)
diff --git a/src/main/java/com/topjohnwu/magisk/utils/Const.java b/src/main/java/com/topjohnwu/magisk/utils/Const.java
index 983e8ac26..ec713c4b4 100644
--- a/src/main/java/com/topjohnwu/magisk/utils/Const.java
+++ b/src/main/java/com/topjohnwu/magisk/utils/Const.java
@@ -3,6 +3,7 @@ package com.topjohnwu.magisk.utils;
 import android.os.Environment;
 import android.os.Process;
 
+import com.topjohnwu.magisk.BuildConfig;
 import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.superuser.io.SuFile;
 
@@ -13,7 +14,7 @@ import java.util.List;
 public class Const {
 
     public static final String DEBUG_TAG = "MagiskManager";
-    public static final String ORIG_PKG_NAME = "com.topjohnwu.magisk";
+    public static final String ORIG_PKG_NAME = BuildConfig.APPLICATION_ID;
     public static final String SNET_PKG = "com.topjohnwu.snet";
     public static final String MAGISKHIDE_PROP = "persist.magisk.hide";
 
diff --git a/src/main/res/values-zh-rTW/strings.xml b/src/main/res/values-zh-rTW/strings.xml
index a3c662bf8..fad6a12b9 100644
--- a/src/main/res/values-zh-rTW/strings.xml
+++ b/src/main/res/values-zh-rTW/strings.xml
@@ -219,5 +219,7 @@
     <string name="settings_check_update_title">檢查更新</string>
     <string name="settings_check_update_summary">在背景定期檢查更新</string>
     <string name="disable_fingerprint">沒有指紋加入或是裝置不支援</string>
+    <string name="cannot_check_sn_title">無法檢查 SafetyNet</string>
+    <string name="cannot_check_sn_notice">由於一些 Google Play Service 的改變，重新包裝過的 Magisk Manager 無法進行 SafetyNet 檢查。</string>
 
 </resources>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 7381f8c76..7b007793d 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -123,6 +123,8 @@
     <string name="proprietary_title">Download Proprietary Code</string>
     <string name="proprietary_notice">Magisk Manager is FOSS, which doesn\'t contain Google\'s proprietary SafetyNet API code.\n\nDo you allow Magisk Manager to download an extension (contains GoogleApiClient) for SafetyNet checks?</string>
     <string name="su_db_corrupt">SU database is corrupted, will recreate new db</string>
+    <string name="cannot_check_sn_title">Cannot check SafetyNet</string>
+    <string name="cannot_check_sn_notice">Due to some changes in Google Play Services, it is not possible to check SafetyNet on repackaged Magisk Manager</string>
 
     <!--Settings Activity -->
     <string name="settings_general_category">General</string>