diff --git a/CHANGELOG b/CHANGELOG
index 1fbbaf5..afb8262 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,5 @@
 0.5.0
+ - fix: fast file size check for detecting invalid upload did not take place
  - setup: migrate to pyproject.toml
 0.4.2:
  - fix: properly check output directory (#20)
diff --git a/mpl_data_cast/recipe.py b/mpl_data_cast/recipe.py
index 52a6636..bb93890 100644
--- a/mpl_data_cast/recipe.py
+++ b/mpl_data_cast/recipe.py
@@ -177,7 +177,7 @@ def transfer_to_target_path(temp_path: pathlib.Path,
         if target_path.exists():
             if check_existing:
                 # first check the size, then the hash
-                if (temp_path.stat().st_size != temp_path.stat().st_size
+                if (target_path.stat().st_size != temp_path.stat().st_size
                         or hashfile(target_path) != hash_ok):
                     # The file is not the same, delete it and try again.
                     target_path.unlink()