diff --git a/packages/next/src/client/components/error-boundary.tsx b/packages/next/src/client/components/error-boundary.tsx
index 13d87fb40c18e..ad661efaac03c 100644
--- a/packages/next/src/client/components/error-boundary.tsx
+++ b/packages/next/src/client/components/error-boundary.tsx
@@ -109,7 +109,8 @@ export class ErrorBoundaryHandler extends React.Component<
     this.setState({ error: null })
   }
 
-  render() {
+  // Explicit type is needed to avoid the generated `.d.ts` having a wide return type that could be specific the the `@types/react` version.
+  render(): React.ReactNode {
     if (this.state.error) {
       return (
         <>
diff --git a/packages/next/src/client/components/redirect-boundary.tsx b/packages/next/src/client/components/redirect-boundary.tsx
index f0ee6fad318c4..c4530614895ac 100644
--- a/packages/next/src/client/components/redirect-boundary.tsx
+++ b/packages/next/src/client/components/redirect-boundary.tsx
@@ -58,7 +58,8 @@ export class RedirectErrorBoundary extends React.Component<
     throw error
   }
 
-  render() {
+  // Explicit type is needed to avoid the generated `.d.ts` having a wide return type that could be specific the the `@types/react` version.
+  render(): React.ReactNode {
     const { redirect, redirectType } = this.state
     if (redirect !== null && redirectType !== null) {
       return (
diff --git a/packages/react-dev-overlay/src/internal/ErrorBoundary.tsx b/packages/react-dev-overlay/src/internal/ErrorBoundary.tsx
index 429c7cefa4199..20ffe17f616c6 100644
--- a/packages/react-dev-overlay/src/internal/ErrorBoundary.tsx
+++ b/packages/react-dev-overlay/src/internal/ErrorBoundary.tsx
@@ -30,7 +30,8 @@ class ErrorBoundary extends React.PureComponent<
     }
   }
 
-  render() {
+  // Explicit type is needed to avoid the generated `.d.ts` having a wide return type that could be specific the the `@types/react` version.
+  render(): React.ReactNode {
     // The component has to be unmounted or else it would continue to error
     return this.state.error ||
       (this.props.globalOverlay && this.props.isMounted) ? (