diff --git a/ml-proto/host/import/env.ml b/ml-proto/host/import/env.ml
index ad4bbfc2a1..d25b510675 100644
--- a/ml-proto/host/import/env.ml
+++ b/ml-proto/host/import/env.ml
@@ -1,6 +1,7 @@
 (*
  * Emulation of (a subset of) the `env` module currently used by Binaryen,
- * so that we can run modules generated by Binaryen.
+ * so that we can run modules generated by Binaryen. This is a stopgap until
+ * we have agreement on what libc should look like.
  *)
 
 open Values