diff --git a/otx/api/entities/result_media.py b/otx/api/entities/result_media.py
index da1396c5068..6079f3da48f 100644
--- a/otx/api/entities/result_media.py
+++ b/otx/api/entities/result_media.py
@@ -82,7 +82,7 @@ def __init__(
         self.annotation_scene = annotation_scene
         self.roi = Annotation(Rectangle.generate_full_box(), labels=[]) if roi is None else roi
         self.label = label
-        self.numpy = np.copy(numpy)
+        self._numpy = np.copy(numpy)
 
     def __repr__(self):
         """Returns a string with all the attributes of the ResultMediaEntity."""