diff --git a/src/pools/fixedRate/FixedRateExchange.ts b/src/pools/fixedRate/FixedRateExchange.ts
index 90e2bab9..a7874ac2 100644
--- a/src/pools/fixedRate/FixedRateExchange.ts
+++ b/src/pools/fixedRate/FixedRateExchange.ts
@@ -274,7 +274,7 @@ export class FixedRateExchange {
       exchange.baseToken,
       minBaseTokenAmount
     )
-    const estGas = await this.estBuyDT(
+    const estGas = await this.estSellDT(
       address,
       exchangeId,
       dtAmountFormatted,