diff --git a/google/cloud/aiplatform/models.py b/google/cloud/aiplatform/models.py
index ab22d20f10..c934a01eec 100644
--- a/google/cloud/aiplatform/models.py
+++ b/google/cloud/aiplatform/models.py
@@ -2775,7 +2775,7 @@ def upload_xgboost_model_file(
                 Also if model directory does not contain a supported model file.
         """
         if not display_name:
-            display_name = cls.__class__.__generate_display_name("XGBoost model")
+            display_name = cls._generate_display_name("XGBoost model")
 
         XGBOOST_SUPPORTED_MODEL_FILE_EXTENSIONS = [
             ".pkl",