diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7468b33748..d7327ab5b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,10 @@
 
 # 11.1.0-rc.2 (Unreleased)
 
+#### :bug: Bug Fix
+
+- Fix issue with async and newtype in uncurried mode. https://github.com/rescript-lang/rescript-compiler/pull/6601
+
 # 11.1.0-rc.1
 
 #### :rocket: New Feature
diff --git a/jscomp/ml/ast_async.ml b/jscomp/ml/ast_async.ml
index d16b193a4c..b1552cd9a2 100644
--- a/jscomp/ml/ast_async.ml
+++ b/jscomp/ml/ast_async.ml
@@ -13,12 +13,18 @@ let add_promise_type ?(loc = Location.none) ~async
 
 let add_async_attribute ~async (body : Parsetree.expression) =
   if async then
-    {
-      body with
-      pexp_attributes =
-        ({txt = "res.async"; loc = Location.none}, PStr [])
-        :: body.pexp_attributes;
-    }
+   (   
+      match body.pexp_desc with
+      | Pexp_construct (x, Some e) when Ast_uncurried.exprIsUncurriedFun body ->
+        {body with pexp_desc = Pexp_construct (x, Some {e  with pexp_attributes =
+        ({txt = "res.async"; loc = Location.none}, PStr []) :: e.pexp_attributes} )}
+      | _ ->
+        {
+          body with
+          pexp_attributes =
+            ({txt = "res.async"; loc = Location.none}, PStr [])
+            :: body.pexp_attributes;
+        })
   else body
 
 let rec add_promise_to_result ~loc (e : Parsetree.expression) =
diff --git a/jscomp/test/async_await.js b/jscomp/test/async_await.js
index 0c674d3b90..d376f50acf 100644
--- a/jscomp/test/async_await.js
+++ b/jscomp/test/async_await.js
@@ -34,6 +34,10 @@ var toplevelAwait = await topFoo();
 
 var toplevelAwait2 = Caml_array.get(arr, await topFoo());
 
+async function f(value) {
+  return await Promise.resolve(1);
+}
+
 exports.next = next;
 exports.useNext = useNext;
 exports.Make = Make;
@@ -41,4 +45,5 @@ exports.topFoo = topFoo;
 exports.arr = arr;
 exports.toplevelAwait = toplevelAwait;
 exports.toplevelAwait2 = toplevelAwait2;
+exports.f = f;
 /* toplevelAwait Not a pure module */
diff --git a/jscomp/test/async_await.res b/jscomp/test/async_await.res
index fd7bf92f34..85aafb08bd 100644
--- a/jscomp/test/async_await.res
+++ b/jscomp/test/async_await.res
@@ -16,3 +16,7 @@ let arr = [1, 2, 3]
 
 let toplevelAwait = await topFoo()
 let toplevelAwait2 = arr[await topFoo()]
+
+let f = async (type input, value: input) => {
+  await Js.Promise.resolve(. 1)
+}
\ No newline at end of file