diff --git a/cli/logging.ts b/cli/logging.ts
index fd1100c51f4..c58bab77d41 100644
--- a/cli/logging.ts
+++ b/cli/logging.ts
@@ -8,7 +8,7 @@ export const stderr = (...parameters: readonly unknown[]) =>
 	process.stderr.write(`${parameters.join('')}\n`);
 
 export function handleError(error: RollupError, recover = false): void {
-	const name = error.name || error.cause?.name;
+	const name = error.name || (error.cause as Error)?.name;
 	const nameSection = name ? `${name}: ` : '';
 	const pluginSection = error.plugin ? `(plugin ${error.plugin}) ` : '';
 	const message = `${pluginSection}${nameSection}${error.message}`;
diff --git a/src/rollup/types.d.ts b/src/rollup/types.d.ts
index 1c35370a821..103e6b6e9e5 100644
--- a/src/rollup/types.d.ts
+++ b/src/rollup/types.d.ts
@@ -19,7 +19,7 @@ export type RollupWarning = RollupLog;
 
 export interface RollupLog {
 	binding?: string;
-	cause?: Error;
+	cause?: unknown;
 	code?: string;
 	exporter?: string;
 	frame?: string;