diff --git a/index.js b/index.js
index 9ca90c0..8f286e4 100644
--- a/index.js
+++ b/index.js
@@ -110,7 +110,11 @@ const destroyCircular = ({
 		}
 
 		if (!value || typeof value !== 'object') {
-			to[key] = value;
+			// Gracefully handle non-configurable errors like `DOMException`.
+			try {
+				to[key] = value;
+			} catch {}
+
 			continue;
 		}
 
@@ -159,7 +163,8 @@ export function serializeError(value, options = {}) {
 	// People sometimes throw things besides Error objects…
 	if (typeof value === 'function') {
 		// `JSON.stringify()` discards functions. We do too, unless a function is thrown directly.
-		return `[Function: ${value.name ?? 'anonymous'}]`;
+		// We intentionally use `||` because `.name` is an empty string for anonymous functions.
+		return `[Function: ${value.name || 'anonymous'}]`;
 	}
 
 	return value;
diff --git a/test.js b/test.js
index ca0d741..45ced34 100644
--- a/test.js
+++ b/test.js
@@ -520,3 +520,10 @@ test('should serialize custom non-extensible error with custom `.toJSON` propert
 
 	t.not(stack, undefined);
 });
+
+if ('DOMException' in globalThis) {
+	test('should serialize DOMException', t => {
+		const serialized = serializeError(new DOMException('x'));
+		t.is(serialized.message, 'x');
+	});
+}