diff --git a/lib/restError.ts b/lib/restError.ts
index e312720..ca0f7c6 100644
--- a/lib/restError.ts
+++ b/lib/restError.ts
@@ -21,5 +21,7 @@ export class RestError extends Error {
     this.request = request;
     this.response = response;
     this.body = body;
+
+    Object.setPrototypeOf(this, RestError.prototype);
   }
 }
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