diff --git a/packages/Keyguard/res/layout/keyguard_password_view.xml b/packages/Keyguard/res/layout/keyguard_password_view.xml
index 7dcaf6d004e79..7d4501749c44d 100644
--- a/packages/Keyguard/res/layout/keyguard_password_view.xml
+++ b/packages/Keyguard/res/layout/keyguard_password_view.xml
@@ -57,6 +57,7 @@
              android:textSize="16sp"
              android:textAppearance="?android:attr/textAppearanceMedium"
              android:imeOptions="flagForceAscii|actionDone"
+             android:maxLength="500"
              />
 
          <ImageView android:id="@+id/switch_ime_button"