diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/smsCommunicator/activities/SmsCommunicatorOtpActivity.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/smsCommunicator/activities/SmsCommunicatorOtpActivity.kt
index 964d87ab70..12e4679d38 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/smsCommunicator/activities/SmsCommunicatorOtpActivity.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/smsCommunicator/activities/SmsCommunicatorOtpActivity.kt
@@ -6,6 +6,7 @@ import android.os.Bundle
 import android.text.Editable
 import android.text.TextWatcher
 import android.view.View
+import android.view.WindowManager
 import com.google.common.primitives.Ints.min
 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel
 import info.nightscout.androidaps.R
@@ -31,6 +32,7 @@ class SmsCommunicatorOtpActivity : NoSplashAppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        window.setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
         setContentView(R.layout.activity_smscommunicator_otp)
 
         smscommunicator_otp_verify_edit.addTextChangedListener(object : TextWatcher {