diff --git a/src/com/android/settings/ConfirmLockPassword.java b/src/com/android/settings/ConfirmLockPassword.java
index 228f4a9..5214449 100644
--- a/src/com/android/settings/ConfirmLockPassword.java
+++ b/src/com/android/settings/ConfirmLockPassword.java
@@ -319,11 +319,15 @@
                 return;
             }
 
-            mPasswordEntryInputDisabler.setInputEnabled(false);
-
             final String pin = mPasswordEntry.getText().toString();
+            if (TextUtils.isEmpty(pin)) {
+                return;
+            }
+
+            mPasswordEntryInputDisabler.setInputEnabled(false);
             final boolean verifyChallenge = getActivity().getIntent().getBooleanExtra(
                     ChooseLockSettingsHelper.EXTRA_KEY_HAS_CHALLENGE, false);
+
             Intent intent = new Intent();
             if (verifyChallenge)  {
                 if (isInternalActivity()) {