diff --git a/packages/cli/src/ResponseHelper.ts b/packages/cli/src/ResponseHelper.ts
index 8ade1c3f1..9117b2bac 100644
--- a/packages/cli/src/ResponseHelper.ts
+++ b/packages/cli/src/ResponseHelper.ts
@@ -133,7 +133,7 @@ export function sendErrorResponse(res: Response, error: Error) {
 
 	const response: ErrorResponse = {
 		code: 0,
-		message: 'Unknown error',
+		message: error.message ?? 'Unknown error',
 	};
 
 	if (error instanceof ResponseError) {
@@ -141,7 +141,6 @@ export function sendErrorResponse(res: Response, error: Error) {
 			console.error(picocolors.red(error.httpStatusCode), error.message);
 		}
 
-		response.message = error.message;
 		httpStatusCode = error.httpStatusCode;
 
 		if (error.errorCode) {