diff --git a/python/ray/_raylet.pyx b/python/ray/_raylet.pyx
index 6b15ba0dc..439f079f8 100644
--- a/python/ray/_raylet.pyx
+++ b/python/ray/_raylet.pyx
@@ -1726,7 +1726,6 @@ cdef class CoreWorker:
             CObjectID c_object_id = object_ref.native()
             CAddress c_owner_address = CAddress()
             c_string serialized_object_status
-        CCoreWorkerProcess.GetCoreWorker().PromoteObjectToPlasma(c_object_id)
         CCoreWorkerProcess.GetCoreWorker().GetOwnershipInfo(
                 c_object_id, &c_owner_address, &serialized_object_status)
         return (object_ref,
diff --git a/src/ray/core_worker/core_worker.cc b/src/ray/core_worker/core_worker.cc
index e28f2c5c0..15540055a 100644
--- a/src/ray/core_worker/core_worker.cc
+++ b/src/ray/core_worker/core_worker.cc
@@ -1025,6 +1025,7 @@ void CoreWorker::PutObjectIntoPlasma(const RayObject &object, const ObjectID &ob
 }
 
 void CoreWorker::PromoteObjectToPlasma(const ObjectID &object_id) {
+  // TODO(swang): Remove.
   auto value = memory_store_->GetOrPromoteToPlasma(object_id);
   if (value) {
     PutObjectIntoPlasma(*value, object_id);