diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index bec9c24f14..b9334c24f8 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -259,6 +259,7 @@ const GetVoteAccounts = jsonRpcResult(
         epochVoteAccount: 'boolean',
         commission: 'number',
         lastVote: 'number',
+        rootSlot: 'number?',
       }),
     ]),
     delinquent: struct.list([
@@ -269,6 +270,7 @@ const GetVoteAccounts = jsonRpcResult(
         epochVoteAccount: 'boolean',
         commission: 'number',
         lastVote: 'number',
+        rootSlot: 'number?',
       }),
     ]),
   }),