diff --git a/src/fusion-order/fusion-extension.ts b/src/fusion-order/fusion-extension.ts
index a8a4dce..8985bd6 100644
--- a/src/fusion-order/fusion-extension.ts
+++ b/src/fusion-order/fusion-extension.ts
@@ -129,21 +129,35 @@ export class FusionExtension {
         const hasFees =
             !integratorFeeRecipient.isZero() || !protocolFeeRecipient.isZero()
 
-        const fees = hasFees
-            ? new FeeTakerExt.Fees(
-                  new FeeTakerExt.ResolverFee(
+        if (!hasFees) {
+            return new FusionExtension(
+                settlementContract,
+                auctionDetails,
+                interactionData.whitelist,
+                {
+                    makerPermit,
+                    customReceiver
+                }
+            )
+        }
+
+        const fees = new FeeTakerExt.Fees(
+            interactionData.fees.resolverFee.isZero()
+                ? FeeTakerExt.ResolverFee.ZERO
+                : new FeeTakerExt.ResolverFee(
                       protocolFeeRecipient,
                       interactionData.fees.resolverFee,
                       interactionData.fees.whitelistDiscount
                   ),
-                  new FeeTakerExt.IntegratorFee(
+            interactionData.fees.integratorFee.isZero()
+                ? FeeTakerExt.IntegratorFee.ZERO
+                : new FeeTakerExt.IntegratorFee(
                       integratorFeeRecipient,
                       protocolFeeRecipient,
                       interactionData.fees.integratorFee,
                       interactionData.fees.integratorShare
                   )
-              )
-            : undefined
+        )
 
         return new FusionExtension(
             settlementContract,
diff --git a/src/fusion-order/fusion-order.spec.ts b/src/fusion-order/fusion-order.spec.ts
index a396f93..0790d7d 100644
--- a/src/fusion-order/fusion-order.spec.ts
+++ b/src/fusion-order/fusion-order.spec.ts
@@ -1,6 +1,5 @@
-import {Address, Bps, MakerTraits} from '@1inch/limit-order-sdk'
+import {Address, Bps, MakerTraits, FeeTakerExt} from '@1inch/limit-order-sdk'
 import {parseUnits} from 'ethers'
-import {FeeTakerExt} from '@1inch/limit-order-sdk'
 import {FusionOrder} from './fusion-order'
 import {AuctionDetails} from './auction-details'
 import {Whitelist} from './whitelist'