diff --git a/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js b/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
index d46f61035b8d4..af53a2a6acf47 100644
--- a/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
+++ b/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
@@ -3401,7 +3401,7 @@ export function suspendResource(
   }
 }
 
-export function waitForCommitToBeReady(): null | (Function => Function) {
+export function waitForCommitToBeReady(): null | ((() => void) => () => void) {
   if (suspendedState === null) {
     throw new Error(
       'Internal React Error: suspendedState null when it was expected to exists. Please report this as a React bug.',
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.js b/packages/react-reconciler/src/ReactFiberWorkLoop.js
index c13b9c65a65a4..dd298ca7b653a 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.js
@@ -1322,6 +1322,8 @@ function commitRootWhenReady(
           updatedLanes,
           suspendedRetryLanes,
           SUSPENDED_COMMIT,
+          completedRenderStartTime,
+          completedRenderEndTime,
         ),
       );
       markRootSuspended(root, lanes, spawnedLane, didSkipSuspendedSiblings);
@@ -3087,8 +3089,6 @@ function commitRoot(
     ReactSharedInternals.T = prevTransition;
     setCurrentUpdatePriority(previousUpdateLanePriority);
   }
-
-  return null;
 }
 
 function commitRootImpl(