diff --git a/core/java/android/os/storage/StorageManager.java b/core/java/android/os/storage/StorageManager.java
index d679fc7..423ce77 100644
--- a/core/java/android/os/storage/StorageManager.java
+++ b/core/java/android/os/storage/StorageManager.java
@@ -268,6 +268,9 @@
     public static final int ENCRYPTION_STATE_ERROR_CORRUPT =
             IVold.ENCRYPTION_STATE_ERROR_CORRUPT;
 
+    /** @hide Prefix used in sandboxIds for apps with sharedUserIds */
+    public static final String SHARED_SANDBOX_PREFIX = "shared-";
+
     private static volatile IStorageManager sStorageManager = null;
 
     private final Context mContext;
diff --git a/core/tests/packagemanagertests/src/android/content/pm/KernelPackageMappingTests.java b/core/tests/packagemanagertests/src/android/content/pm/KernelPackageMappingTests.java
index 01382aa..4e0f2a8 100644
--- a/core/tests/packagemanagertests/src/android/content/pm/KernelPackageMappingTests.java
+++ b/core/tests/packagemanagertests/src/android/content/pm/KernelPackageMappingTests.java
@@ -81,7 +81,7 @@
 
     @Test
     public void testSharedInstalledPrimary() throws Exception {
-        assertEquals("1001", getContent(getKernelPackageFile("shared:android.uid.phone", "appid")));
+        assertEquals("1001", getContent(getKernelPackageFile("shared-android.uid.phone", "appid")));
     }
 
     @Test
@@ -92,7 +92,7 @@
 
     @Test
     public void testSharedInstalledAll() throws Exception {
-        assertEquals("", getContent(getKernelPackageFile("shared:android.uid.phone",
+        assertEquals("", getContent(getKernelPackageFile("shared-android.uid.phone",
                 "excluded_userids")));
     }
 
diff --git a/services/core/java/com/android/server/StorageManagerService.java b/services/core/java/com/android/server/StorageManagerService.java
index 78e82b6..923ac00 100644
--- a/services/core/java/com/android/server/StorageManagerService.java
+++ b/services/core/java/com/android/server/StorageManagerService.java
@@ -186,8 +186,6 @@
     private static final boolean ENABLE_ISOLATED_STORAGE = SystemProperties
             .getBoolean(StorageManager.PROP_ISOLATED_STORAGE, false);
 
-    private static final String SHARED_SANDBOX_ID_PREFIX = "shared:";
-
     public static class Lifecycle extends SystemService {
         private StorageManagerService mStorageManagerService;
 
@@ -1501,7 +1499,8 @@
     }
 
     private static String getSandboxId(String packageName, String sharedUserId) {
-        return sharedUserId == null ? packageName : SHARED_SANDBOX_ID_PREFIX + sharedUserId;
+        return sharedUserId == null
+                ? packageName : StorageManager.SHARED_SANDBOX_PREFIX + sharedUserId;
     }
 
     private void connect() {
diff --git a/services/core/java/com/android/server/pm/Settings.java b/services/core/java/com/android/server/pm/Settings.java
index 4c93441..6009bd3 100644
--- a/services/core/java/com/android/server/pm/Settings.java
+++ b/services/core/java/com/android/server/pm/Settings.java
@@ -2637,7 +2637,7 @@
         }
 
         for (final SharedUserSetting sus : mSharedUsers.values()) {
-            knownSet.remove(sus.getSandboxName());
+            knownSet.remove(sus.getStorageSandboxName());
         }
 
         // Remove any unclaimed mappings
@@ -2653,7 +2653,8 @@
     void writeKernelMappingLPr(SharedUserSetting sus) {
         if (mKernelMappingFilename == null || sus == null || sus.name == null) return;
 
-        writeKernelMappingLPr(sus.getSandboxName(), sus.userId, sus.getNotInstalledUserIds());
+        writeKernelMappingLPr(sus.getStorageSandboxName(),
+                sus.userId, sus.getNotInstalledUserIds());
     }
 
     void writeKernelMappingLPr(PackageSetting ps) {
diff --git a/services/core/java/com/android/server/pm/SharedUserSetting.java b/services/core/java/com/android/server/pm/SharedUserSetting.java
index 32826e5..d67144e 100644
--- a/services/core/java/com/android/server/pm/SharedUserSetting.java
+++ b/services/core/java/com/android/server/pm/SharedUserSetting.java
@@ -19,6 +19,7 @@
 import android.annotation.Nullable;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageParser;
+import android.os.storage.StorageManager;
 import android.service.pm.PackageServiceDumpProto;
 import android.util.ArraySet;
 import android.util.proto.ProtoOutputStream;
@@ -166,8 +167,8 @@
         return excludedUserIds == null ? EmptyArray.INT : excludedUserIds;
     }
 
-    public String getSandboxName() {
-        return "shared:" + name;
+    public String getStorageSandboxName() {
+        return StorageManager.SHARED_SANDBOX_PREFIX + name;
     }
 
     /** Updates all fields in this shared user setting from another. */
diff --git a/services/tests/servicestests/src/com/android/server/StorageManagerServiceTest.java b/services/tests/servicestests/src/com/android/server/StorageManagerServiceTest.java
index ee42ce8..e6b328a 100644
--- a/services/tests/servicestests/src/com/android/server/StorageManagerServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/StorageManagerServiceTest.java
@@ -125,7 +125,7 @@
                 "/storage/emulated/0/foo.jpg",
                 PID_GREY, UID_GREY);
         assertTranslation(
-                "/storage/emulated/0/Android/sandbox/shared:colors/foo.jpg",
+                "/storage/emulated/0/Android/sandbox/shared-colors/foo.jpg",
                 "/storage/emulated/0/foo.jpg",
                 PID_RED, UID_COLORS);
     }
@@ -137,7 +137,7 @@
                 "/storage/0000-0000/foo/bar.jpg",
                 PID_GREY, UID_GREY);
         assertTranslation(
-                "/storage/0000-0000/Android/sandbox/shared:colors/foo/bar.jpg",
+                "/storage/0000-0000/Android/sandbox/shared-colors/foo/bar.jpg",
                 "/storage/0000-0000/foo/bar.jpg",
                 PID_RED, UID_COLORS);
     }
@@ -152,7 +152,7 @@
 
         // Accessing other package paths goes into sandbox
         assertTranslation(
-                "/storage/emulated/0/Android/sandbox/shared:colors/"
+                "/storage/emulated/0/Android/sandbox/shared-colors/"
                         + "Android/data/com.grey/foo.jpg",
                 "/storage/emulated/0/Android/data/com.grey/foo.jpg",
                 PID_RED, UID_COLORS);
@@ -201,7 +201,7 @@
         // Sandboxes can't see paths in other sandboxes
         try {
             mService.translateSystemToApp(
-                    "/storage/emulated/0/Android/sandbox/shared:colors/foo.jpg",
+                    "/storage/emulated/0/Android/sandbox/shared-colors/foo.jpg",
                     PID_GREY, UID_GREY);
             fail();
         } catch (SecurityException expected) {