diff -uNr ppx_let-113.33.00/_oasis ppx_let-113.33.00+4.03/_oasis
--- ppx_let-113.33.00/_oasis	2016-03-09 16:44:54.000000000 +0100
+++ ppx_let-113.33.00+4.03/_oasis	2016-03-22 15:13:50.000000000 +0100
@@ -1,8 +1,8 @@
 OASISFormat:      0.4
-OCamlVersion:     >= 4.02.3
+OCamlVersion:     >= 4.03.0
 FindlibVersion:   >= 1.3.2
 Name:             ppx_let
-Version:          113.33.00
+Version:          113.33.00+4.03
 Synopsis:         Monadic let-bindings
 Authors:          Jane Street Group, LLC <opensource@janestreet.com>
 Copyrights:       (C) 2015-2016 Jane Street Group LLC <opensource@janestreet.com>
diff -uNr ppx_let-113.33.00/opam ppx_let-113.33.00+4.03/opam
--- ppx_let-113.33.00/opam	2016-03-18 12:08:01.000000000 +0100
+++ ppx_let-113.33.00+4.03/opam	2016-03-22 17:51:37.000000000 +0100
@@ -15,4 +15,4 @@
   "ppx_core"
   "ppx_driver"
 ]
-available: [ ocaml-version >= "4.02.3" ]
+available: [ ocaml-version >= "4.03.0" ]
diff -uNr ppx_let-113.33.00/src/ppx_let.ml ppx_let-113.33.00+4.03/src/ppx_let.ml
--- ppx_let-113.33.00/src/ppx_let.ml	2016-03-09 16:44:54.000000000 +0100
+++ ppx_let-113.33.00+4.03/src/ppx_let.ml	2016-03-22 15:13:50.000000000 +0100
@@ -64,7 +64,7 @@
   in
   pexp_apply ~loc
     (eoperator ~loc (Extension_name.operator_name extension_name))
-    [("", arg); (fn_label, fn)]
+    [(Nolabel, arg); (Labelled fn_label, fn)]
 ;;
 
 let maybe_open extension_name ~to_open:module_to_open expr =
@@ -90,7 +90,7 @@
       ppat_tuple ~loc [p; acc])
   in
   bind_apply ~loc extension_name ~arg:nested_boths
-    ~fn:(pexp_fun ~loc "" None nested_patterns
+    ~fn:(pexp_fun ~loc Nolabel None nested_patterns
            (maybe_open extension_name ~to_open:open_in_body body))
 ;;