diff --git a/ctypes.opam b/ctypes.opam
index f79d57cd..80af968f 100644
--- a/ctypes.opam
+++ b/ctypes.opam
@@ -27,7 +27,7 @@ This will make the `ctypes-foreign` ocamlfind subpackage available.
 
 pin-depends: [
   [ "integers.dev" "git+http://github.com/yallop/ocaml-integers.git" ]
-  [ "dune.dev" "git+http://github.com/ocaml/dune.git" ]
+  [ "dune.dev" "git+http://github.com/rgrinberg/dune.git#always-print-exn" ]
 ]
 depends: [
   "ocaml" {>= "4.02.3"}