diff --git a/src/index.ts b/src/index.ts
index f27e10d..120afee 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,10 @@
 export { JsonRpcError, EthereumProviderError } from './classes';
-export { serializeCause, serializeError, getMessageFromCode } from './utils';
+export {
+  dataHasCause,
+  serializeCause,
+  serializeError,
+  getMessageFromCode,
+} from './utils';
 export type {
   DataWithOptionalCause,
   OptionalDataWithOptionalCause,