diff --git a/src/React.re b/src/React.re
index ba02b4222..e17931519 100644
--- a/src/React.re
+++ b/src/React.re
@@ -479,7 +479,8 @@ type callbackAsync('input, 'output) = 'input => Js.Promise.t('output);
  */
 [@mel.module "react"]
 external useState:
-  ([@mel.uncurry] (unit => 'state)) => ('state, ('state => 'state) => unit) =
+  ([@mel.uncurry] (unit => 'state)) =>
+  ('state, (. ('state => 'state)) => unit) =
   "useState";
 
 [@mel.module "react"]
diff --git a/src/React.rei b/src/React.rei
index 372337618..2fac4bd03 100644
--- a/src/React.rei
+++ b/src/React.rei
@@ -167,7 +167,8 @@ module Suspense: {
  */
 [@mel.module "react"]
 external useState:
-  ([@mel.uncurry] (unit => 'state)) => ('state, ('state => 'state) => unit) =
+  ([@mel.uncurry] (unit => 'state)) =>
+  ('state, (. ('state => 'state)) => unit) =
   "useState";
 
 [@mel.module "react"]