diff --git a/api/onnx_web/output.py b/api/onnx_web/output.py
index f9e76770..2aa221a9 100644
--- a/api/onnx_web/output.py
+++ b/api/onnx_web/output.py
@@ -102,7 +102,7 @@ def save_result(
                 save_image(
                     server,
                     filename,
-                    image,
+                    thumbnail,
                 )
             )