1 files changed, 1 insertions, 1 deletions
diff --git a/packages/order-utils/src/store/balance_and_proxy_allowance_lazy_store.ts b/packages/order-utils/src/store/balance_and_proxy_allowance_lazy_store.ts
index e7352119d..6d5a02adf 100644
--- a/packages/order-utils/src/store/balance_and_proxy_allowance_lazy_store.ts
+++ b/packages/order-utils/src/store/balance_and_proxy_allowance_lazy_store.ts
@@ -8,7 +8,7 @@ import { AbstractBalanceAndProxyAllowanceLazyStore } from '../abstract/abstract_
  * Copy on read store for balances/proxyAllowances of tokens/accounts
  */
 export class BalanceAndProxyAllowanceLazyStore implements AbstractBalanceAndProxyAllowanceLazyStore {
-    private _balanceAndProxyAllowanceFetcher: AbstractBalanceAndProxyAllowanceFetcher;
+    private readonly _balanceAndProxyAllowanceFetcher: AbstractBalanceAndProxyAllowanceFetcher;
     private _balance: {
         [assetData: string]: {
             [userAddress: string]: BigNumber;