diff --git a/packages/asset-swapper/src/utils/market_operation_utils/orders.ts b/packages/asset-swapper/src/utils/market_operation_utils/orders.ts
index e37714d2a0..3a381e8680 100644
--- a/packages/asset-swapper/src/utils/market_operation_utils/orders.ts
+++ b/packages/asset-swapper/src/utils/market_operation_utils/orders.ts
@@ -21,6 +21,7 @@ import {
     GeistFillData,
     GenericRouterFillData,
     GMXFillData,
+    GMXSwapFillData,
     KyberDmmFillData,
     KyberFillData,
     LidoFillData,
@@ -372,7 +373,7 @@ export function createBridgeDataForBridgeOrder(order: OptimizedMarketBridgeOrder
             break;
         case ERC20BridgeSource.GMX:
             const gmxFillData = (order as OptimizedMarketBridgeOrder<GMXFillData>).fillData;
-            bridgeData = encoder.encode([gmxFillData.reader, gmxFillData.vault, gmxFillData.tokenAddressPath]);
+            bridgeData = encoder.encode([gmxFillData.router,gmxFillData.reader,gmxFillData.vault, gmxFillData.tokenAddressPath]);
             break;
 
         default:
diff --git a/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts b/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
index c970d5451b..fd88b922d4 100644
--- a/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
+++ b/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
@@ -1219,6 +1219,7 @@ export class SamplerOperations {
         });
     }
     public getGMXSellQuotes(
+        router: string,
         reader: string,
         vault: string,
         tokenAddressPath: string[],
@@ -1226,7 +1227,7 @@ export class SamplerOperations {
     ): SourceQuoteOperation<GMXFillData> {
         return new SamplerContractOperation({
             source: ERC20BridgeSource.GMX,
-            fillData: {reader, vault, tokenAddressPath },
+            fillData: {router, reader, vault, tokenAddressPath },
             contract: this._samplerContract,
             function: this._samplerContract.sampleSellsFromGMX,
             params: [reader, vault, tokenAddressPath, takerFillAmounts],
@@ -1627,9 +1628,10 @@ export class SamplerOperations {
                     case ERC20BridgeSource.GMX: {
 
                         return this.getGMXSellQuotes(
+                            GMX_ROUTER_BY_CHAIN_ID[this.chainId],
                             GMX_READER_BY_CHAIN_ID[this.chainId],
                             GMX_VAULT_BY_CHAIN_ID[this.chainId],
-                            [makerToken, takerToken],
+                            [takerToken, makerToken],
                             takerFillAmounts,
                         );
                     }
diff --git a/packages/asset-swapper/src/utils/market_operation_utils/types.ts b/packages/asset-swapper/src/utils/market_operation_utils/types.ts
index 6f614d9ee5..ae8726f7d9 100644
--- a/packages/asset-swapper/src/utils/market_operation_utils/types.ts
+++ b/packages/asset-swapper/src/utils/market_operation_utils/types.ts
@@ -229,10 +229,15 @@ export interface GMXQuoteFillData extends FillData {
     vault: string;
 }
 export interface GMXFillData extends FillData {
+    router: string;
     reader: string;
     vault: string;
     tokenAddressPath: string[];
 }
+export interface GMXSwapFillData extends FillData {
+    router: string;
+    tokenAddressPath: string[];
+}
 
 export interface ShellFillData extends FillData {
     poolAddress: string;