diff --git a/poetry/puzzle/provider.py b/poetry/puzzle/provider.py
index 73f8284bef0..a0046dce2f0 100755
--- a/poetry/puzzle/provider.py
+++ b/poetry/puzzle/provider.py
@@ -324,7 +324,7 @@ def get_package_from_url(cls, url):  # type: (str) -> Package
         with temporary_directory() as temp_dir:
             temp_dir = Path(temp_dir)
             file_name = os.path.basename(urlparse.urlparse(url).path)
-            download_file(url, temp_dir / file_name)
+            download_file(url, str(temp_dir / file_name))
 
             package = cls.get_package_from_file(temp_dir / file_name)