diff --git a/config/hiddenapi-light-greylist.txt b/config/hiddenapi-light-greylist.txt
index cef272e03ab16..04d412c5e5df5 100644
--- a/config/hiddenapi-light-greylist.txt
+++ b/config/hiddenapi-light-greylist.txt
@@ -2403,10 +2403,6 @@ Landroid/media/VolumeShaper$State;-><init>(FF)V
 Landroid/media/VolumeShaper$State;->mVolume:F
 Landroid/media/VolumeShaper$State;->mXOffset:F
 Landroid/media/WebVttRenderer;-><init>(Landroid/content/Context;)V
-Landroid/mtp/MtpPropertyList;->append(IIIJ)V
-Landroid/mtp/MtpPropertyList;->append(IILjava/lang/String;)V
-Landroid/mtp/MtpStorage;->getPath()Ljava/lang/String;
-Landroid/mtp/MtpStorage;->getStorageId()I
 Landroid/net/ConnectivityManager;->ACTION_TETHER_STATE_CHANGED:Ljava/lang/String;
 Landroid/net/ConnectivityManager;->EXTRA_ACTIVE_TETHER:Ljava/lang/String;
 Landroid/net/ConnectivityManager;->EXTRA_AVAILABLE_TETHER:Ljava/lang/String;
diff --git a/media/java/android/mtp/MtpPropertyList.java b/media/java/android/mtp/MtpPropertyList.java
index ede90dac517ca..557f099c25c1e 100644
--- a/media/java/android/mtp/MtpPropertyList.java
+++ b/media/java/android/mtp/MtpPropertyList.java
@@ -16,6 +16,7 @@
 
 package android.mtp;
 
+import android.annotation.UnsupportedAppUsage;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -49,6 +50,7 @@ class MtpPropertyList {
         mStringValues = new ArrayList<>();
     }
 
+    @UnsupportedAppUsage
     public void append(int handle, int property, int type, long value) {
         mObjectHandles.add(handle);
         mPropertyCodes.add(property);
@@ -57,6 +59,7 @@ class MtpPropertyList {
         mStringValues.add(null);
     }
 
+    @UnsupportedAppUsage
     public void append(int handle, int property, String value) {
         mObjectHandles.add(handle);
         mPropertyCodes.add(property);
diff --git a/media/java/android/mtp/MtpStorage.java b/media/java/android/mtp/MtpStorage.java
index 2625e0cc932c5..c714b3cad296b 100644
--- a/media/java/android/mtp/MtpStorage.java
+++ b/media/java/android/mtp/MtpStorage.java
@@ -16,6 +16,7 @@
 
 package android.mtp;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.storage.StorageVolume;
 
 /**
@@ -46,6 +47,7 @@ public class MtpStorage {
      *
      * @return the storage ID
      */
+    @UnsupportedAppUsage
     public final int getStorageId() {
         return mStorageId;
     }
@@ -55,6 +57,7 @@ public class MtpStorage {
      *
      * @return the storage file path
      */
+    @UnsupportedAppUsage
     public final String getPath() {
         return mPath;
     }