diff --git a/pkgs/development/ocaml-modules/lwt/legacy.nix b/pkgs/development/ocaml-modules/lwt/legacy.nix
index 53ba904f628..cd40a5051be 100644
--- a/pkgs/development/ocaml-modules/lwt/legacy.nix
+++ b/pkgs/development/ocaml-modules/lwt/legacy.nix
@@ -6,6 +6,7 @@
 }:
 
 if !stdenv.lib.versionAtLeast ocaml.version "4"
+ || stdenv.lib.versionAtLeast ocaml.version "4.06"
 then throw "lwt is not available for OCaml ${ocaml.version}"
 else