diff --git a/core/java/android/telephony/TelephonyCallback.java b/core/java/android/telephony/TelephonyCallback.java
index b8b84d9..c6ee497 100644
--- a/core/java/android/telephony/TelephonyCallback.java
+++ b/core/java/android/telephony/TelephonyCallback.java
@@ -33,6 +33,7 @@
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.annotations.WeaklyReferencedCallback;
 import com.android.internal.telephony.IPhoneStateListener;
 import com.android.internal.telephony.flags.Flags;
 
@@ -69,6 +70,7 @@
  * its manifest file. Where permissions apply, they are noted in the
  * appropriate sub-interfaces.
  */
+@WeaklyReferencedCallback
 public class TelephonyCallback {
     private static final String LOG_TAG = "TelephonyCallback";
     /**
diff --git a/core/java/android/view/DisplayEventReceiver.java b/core/java/android/view/DisplayEventReceiver.java
index 18080e4..fc7a65d 100644
--- a/core/java/android/view/DisplayEventReceiver.java
+++ b/core/java/android/view/DisplayEventReceiver.java
@@ -24,6 +24,7 @@
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.annotations.WeaklyReferencedCallback;
 
 import dalvik.annotation.optimization.FastNative;
 
@@ -40,6 +41,7 @@
  *
  * @hide
  */
+@WeaklyReferencedCallback
 public abstract class DisplayEventReceiver {
 
     /**
diff --git a/services/core/java/com/android/server/display/color/ColorDisplayService.java b/services/core/java/com/android/server/display/color/ColorDisplayService.java
index 3883604..d23e76f 100644
--- a/services/core/java/com/android/server/display/color/ColorDisplayService.java
+++ b/services/core/java/com/android/server/display/color/ColorDisplayService.java
@@ -74,6 +74,7 @@
 
 import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.annotations.WeaklyReferencedCallback;
 import com.android.internal.util.DumpUtils;
 import com.android.server.DisplayThread;
 import com.android.server.LocalServices;
@@ -1730,6 +1731,7 @@
     /**
      * Interface for applying transforms to a given AppWindow.
      */
+    @WeaklyReferencedCallback
     public interface ColorTransformController {
 
         /**