diff --git a/VoldNativeService.h b/VoldNativeService.h
index 40ce3a4..d0c31e8 100644
--- a/VoldNativeService.h
+++ b/VoldNativeService.h
@@ -111,9 +111,6 @@ class VoldNativeService : public BinderService<VoldNativeService>, public os::Bn
     binder::Status destroyUserStorage(const std::unique_ptr<std::string>& uuid, int32_t userId,
                                       int32_t flags);
 
-    binder::Status mountExternalStorageForApp(const std::string& packageName, int32_t appId,
-                                              const std::string& sandboxId, int32_t userId);
-
     binder::Status startCheckpoint(int32_t retry);
     binder::Status needsCheckpoint(bool* _aidl_return);
     binder::Status needsRollback(bool* _aidl_return);