diff --git a/types/react/index.d.ts b/types/react/index.d.ts
index 49224d93cf..2ed2fb497c 100644
--- a/types/react/index.d.ts
+++ b/types/react/index.d.ts
@@ -404,7 +404,7 @@ declare namespace React {
          *
          * Note: its presence prevents any of the deprecated lifecycle methods from being invoked
          */
-        (nextProps: Readonly<P>, prevState: Readonly<S>) => Partial<S> | null;
+        (nextProps: Readonly<P>, prevState: S) => Partial<S> | null;
 
     // This should be "infer SS" but can't use it yet
     interface NewLifecycle<P, S, SS> {
diff --git a/types/react/test/tsx.tsx b/types/react/test/tsx.tsx
index b086e35f9f..760a625cfd 100644
--- a/types/react/test/tsx.tsx
+++ b/types/react/test/tsx.tsx
@@ -156,6 +156,7 @@ class ComponentWithLargeState extends React.Component<{}, Record<'a'|'b'|'c', st
         return { a: 'a' };
     }
 }
+const AssignedComponentWithLargeState: React.ComponentClass = ComponentWithLargeState;
 
 const componentWithBadLifecycle = new (class extends React.Component<{}, {}, number> {})({});
 componentWithBadLifecycle.getSnapshotBeforeUpdate = () => { // $ExpectError