diff --git a/storage/filesystem.go b/storage/filesystem.go
index dfbe372..081253e 100644
--- a/storage/filesystem.go
+++ b/storage/filesystem.go
@@ -214,8 +214,8 @@ func (b *filesystemBackend) PutAddressObject(ctx context.Context, path string, c
 	if err != nil {
 		return "", err
 	}
-	path = filepath.Join(basePath, path)
-	f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, 0644)
+	internalPath := filepath.Join(basePath, path)
+	f, err := os.OpenFile(internalPath, os.O_RDWR|os.O_CREATE, 0644)
 	if err != nil {
 		return "", err
 	}