diff --git a/src/rgw/rgw_op.cc b/src/rgw/rgw_op.cc
index 5d7fc74..aedfe03 100644
--- a/src/rgw/rgw_op.cc
+++ b/src/rgw/rgw_op.cc
@@ -4849,6 +4849,15 @@ void RGWCompleteMultipart::execute()
         op_ret = -ERR_INVALID_PART;
         return;
       } else {
+        // mp.get_part() always produce the oid like <obj-name>.<upload-id>.<num>
+        // However, it is not always true after bd8e026f88b812cc70caf6232c247844df5d99bf is merged
+        // https://github.com/ceph/ceph/commit/bd8e026f88b812cc70caf6232c247844df5d99bf
+        // When a part is uploaded more than once, the oid may be like
+        // <obj-name>.<random-alpha-numeric>.<num>
+        const RGWObjManifest::obj_iterator& obj_iter = obj_part.manifest.obj_begin();
+        const string adjusted_oid = const_cast<RGWObjManifest::obj_iterator&>(obj_iter).get_location().get_orig_obj();
+        src_obj.init_ns(s->bucket, adjusted_oid, mp_ns);
+
         manifest.append(obj_part.manifest);
       }