1 files changed, 5 insertions, 1 deletions
diff --git a/src/utils/order_validation_utils.ts b/src/utils/order_validation_utils.ts
index 6f7522c41..de20cf06d 100644
--- a/src/utils/order_validation_utils.ts
+++ b/src/utils/order_validation_utils.ts
@@ -121,7 +121,11 @@ export class OrderValidationUtils {
         }
 
         if (!isMakerTokenZRX) {
-            const makerZRXBalance = await this.tokenWrapper.getBalanceAsync(zrxTokenAddress, signedOrder.maker);
+            const isTakerTokenZRX = signedOrder.takerTokenAddress === zrxTokenAddress;
+            let makerZRXBalance = await this.tokenWrapper.getBalanceAsync(zrxTokenAddress, signedOrder.maker);
+            if (isTakerTokenZRX) {
+                makerZRXBalance = makerZRXBalance.plus(fillTakerAmount);
+            }
             const makerZRXAllowance = await this.tokenWrapper.getProxyAllowanceAsync(
                 zrxTokenAddress, signedOrder.maker);