diff --git a/src/connection.ts b/src/connection.ts
index de07c83a68e2..950a4a808f21 100644
--- a/src/connection.ts
+++ b/src/connection.ts
@@ -1050,6 +1050,7 @@ export type TokenBalance = {
   accountIndex: number;
   mint: string;
   owner?: string;
+  programId?: string;
   uiTokenAmount: TokenAmount;
 };
 
@@ -2330,6 +2331,7 @@ const TokenBalanceResult = pick({
   accountIndex: number(),
   mint: string(),
   owner: optional(string()),
+  programId: optional(string()),
   uiTokenAmount: TokenAmountResult,
 });