diff --git a/pkgs/development/ocaml-modules/asn1-combinators/default.nix b/pkgs/development/ocaml-modules/asn1-combinators/default.nix
index 8447c25cd70..a8e8a9cc847 100644
--- a/pkgs/development/ocaml-modules/asn1-combinators/default.nix
+++ b/pkgs/development/ocaml-modules/asn1-combinators/default.nix
@@ -4,6 +4,7 @@
 
 buildDunePackage rec {
   minimalOCamlVersion = "4.08";
+  duneVersion = "3";
 
   pname = "asn1-combinators";
   version = "0.2.6";