diff --git a/go/vendor/vbom.ml/util/sortorder/doc.go b/go/vendor/vbom.ml/util/sortorder/doc.go
new file mode 100644
index 0000000..61b37a9
--- /dev/null
+++ b/go/vendor/vbom.ml/util/sortorder/doc.go
@@ -0,0 +1,5 @@
+// Package sortorder implements sort orders and comparison functions.
+//
+// Currently, it only implements so-called "natural order", where integers
+// embedded in strings are compared by value.
+package sortorder // import "vbom.ml/util/sortorder"