diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 517995e4be1dd..2b5353d8fb01f 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -3620,6 +3620,14 @@ public final class Settings {
         /** @hide */
         public static final Validator VIBRATE_WHEN_RINGING_VALIDATOR = sBooleanValidator;
 
+        /**
+         * When {@code 1}, Telecom enhanced call blocking functionality is enabled.  When
+         * {@code 0}, enhanced call blocking functionality is disabled.
+         * @hide
+         */
+        public static final String DEBUG_ENABLE_ENHANCED_CALL_BLOCKING =
+                "debug.enable_enhanced_calling";
+
         /**
          * Whether the audible DTMF tones are played by the dialer when dialing. The value is
          * boolean (1 or 0).
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 16c0b8ca48b2a..8a7c5867d7e41 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -64,6 +64,7 @@ public class SettingsBackupTest {
                     Settings.System.NOTIFICATION_LIGHT_PULSE, // candidate for backup?
                     Settings.System.NOTIFICATION_SOUND_CACHE, // internal cache
                     Settings.System.POINTER_LOCATION, // backup candidate?
+                    Settings.System.DEBUG_ENABLE_ENHANCED_CALL_BLOCKING, // used for testing only
                     Settings.System.RINGTONE_CACHE, // internal cache
                     Settings.System.SETUP_WIZARD_HAS_RUN, // Only used by SuW
                     Settings.System.SHOW_GTALK_SERVICE_STATUS, // candidate for backup?