diff --git a/src/worker/fetch.ts b/src/worker/fetch.ts
index 1a1ea83be..6a655e433 100644
--- a/src/worker/fetch.ts
+++ b/src/worker/fetch.ts
@@ -357,6 +357,12 @@ export async function handleFetch(
 			url: request.url,
 			destination: request.destination,
 		};
+		if (err.cause) {
+			errorDetails["cause"] = err.cause;
+			if (err.cause instanceof AggregateError) {
+				errorDetails["causeErrors"] = err.cause.errors;
+			}
+		}
 		if (err.stack) {
 			errorDetails["stack"] = err.stack;
 		}