diff --git a/api/system-current.txt b/api/system-current.txt
index 05aa0ad43bf3d..e79ede8dc9b71 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -4588,6 +4588,7 @@ package android.os.storage {
     method public void allocateBytes(java.util.UUID, long, int) throws java.io.IOException;
     method public void allocateBytes(java.io.FileDescriptor, long, int) throws java.io.IOException;
     method public long getAllocatableBytes(java.util.UUID, int) throws java.io.IOException;
+    method public static boolean hasIsolatedStorage();
     field public static final int FLAG_ALLOCATE_AGGRESSIVE = 1; // 0x1
   }
 
diff --git a/core/java/android/os/storage/StorageManager.java b/core/java/android/os/storage/StorageManager.java
index 9594a713a5062..735f4f253594f 100644
--- a/core/java/android/os/storage/StorageManager.java
+++ b/core/java/android/os/storage/StorageManager.java
@@ -1540,6 +1540,7 @@ public class StorageManager {
     }
 
     /** {@hide} */
+    @SystemApi
     @TestApi
     public static boolean hasIsolatedStorage() {
         // Prefer to use snapshot for current boot when available