diff --git a/build_database.py b/build_database.py
index c91621e..f40d6cf 100644
--- a/build_database.py
+++ b/build_database.py
@@ -98,8 +98,8 @@ async def main_with_ctx(ctx, wanted_date):
 
                 # write to output
                 log.info("copying temp to output")
-                with output_path.open(mode="wb") as output_fd:
-                    shutil.copyfileobj(temp_fd, output_fd)
+                with output_path.open(mode="wb") as output_fdout:
+                    shutil.copyfileobj(temp_fd, output_fdout)
 
     # decompress
     for url_type, _url in urls.items():