diff --git a/join.go b/join.go
index e0ee3f2..e3d5629 100644
--- a/join.go
+++ b/join.go
@@ -115,7 +115,7 @@ func SecureJoinVFS(root, unsafePath string, vfs VFS) (string, error) {
        // There should be no lexical components like ".." left in the path here,
        // but for safety clean up the path before joining it to the root.
        finalPath := filepath.Join(string(filepath.Separator), currentPath)
-       return filepath.Join(root, finalPath), nil
+       return root + string(os.PathSeparator) + finalPath, nil
 }
 
 // SecureJoin is a wrapper around [SecureJoinVFS] that just uses the [os].* library