diff --git a/ride/futures_calculator.ride b/ride/futures_calculator.ride
index 07c6a2c1..7942c13d 100644
--- a/ride/futures_calculator.ride
+++ b/ride/futures_calculator.ride
@@ -569,9 +569,8 @@ func setPairAllowance(callerPublicKey: ByteVector, args: List[String]) = {
 # args: [assetId]
 @Callable(i)
 func addSyntheticAsset(callerPublicKey: ByteVector, args: List[String]) = {
-  let baseAssetIdStr = args[0]
-  let baseAssetId = parseAssetId(baseAssetIdStr)
-  let syntheticAssetId = i.payments[0].assetId
+  let baseAssetId = parseAssetId(args[0])
+  let syntheticAssetId = parseAssetId(args[1])
 
   strict ckecks = [
     !shutdown || throwErr("not allowed"),
@@ -580,9 +579,6 @@ func addSyntheticAsset(callerPublicKey: ByteVector, args: List[String]) = {
     factoryAddress.getString(kSyntheticAssetId(baseAssetId)) == unit || throwErr(
       "invalid base asset"
     ),
-    i.payments.size() == 1 || throwErr(
-      "invalid payments"
-    ),
     factoryAddress.getString(kBaseAssetId(syntheticAssetId)) == unit || throwErr(
       "invalid synthetic asset"
     )