diff --git a/cardano-api/gen/Test/Gen/Cardano/Api/ProtocolParameters.hs b/cardano-api/gen/Test/Gen/Cardano/Api/ProtocolParameters.hs
index 8a0d0cf7ee..84ab63c241 100644
--- a/cardano-api/gen/Test/Gen/Cardano/Api/ProtocolParameters.hs
+++ b/cardano-api/gen/Test/Gen/Cardano/Api/ProtocolParameters.hs
@@ -75,6 +75,7 @@ genIntroducedInConwayPParams =
     <*> genStrictMaybe Q.arbitrary
     <*> genStrictMaybe Q.arbitrary
     <*> genStrictMaybe Q.arbitrary
+    <*> genStrictMaybe Q.arbitrary
 
 genShelleyEraBasedProtocolParametersUpdate :: MonadGen m => m (EraBasedProtocolParametersUpdate ShelleyEra)
 genShelleyEraBasedProtocolParametersUpdate =
diff --git a/cardano-api/internal/Cardano/Api/ProtocolParameters.hs b/cardano-api/internal/Cardano/Api/ProtocolParameters.hs
index 66cca504eb..a5706dd282 100644
--- a/cardano-api/internal/Cardano/Api/ProtocolParameters.hs
+++ b/cardano-api/internal/Cardano/Api/ProtocolParameters.hs
@@ -253,6 +253,7 @@ data IntroducedInConwayPParams era
     , icGovActionDeposit     :: StrictMaybe Ledger.Coin
     , icDRepDeposit          :: StrictMaybe Ledger.Coin
     , icDRepActivity         :: StrictMaybe Ledger.EpochInterval
+    , icMinFeeRefScriptCostPerByte  :: StrictMaybe Ledger.NonNegativeInterval
     } deriving Show
 
 
@@ -270,6 +271,7 @@ createIntroducedInConwayPParams IntroducedInConwayPParams{..} =
       & Ledger.ppuGovActionDepositL .~ icGovActionDeposit
       & Ledger.ppuDRepDepositL .~ icDRepDeposit
       & Ledger.ppuDRepActivityL .~ icDRepActivity
+      & Ledger.ppuMinFeeRefScriptCostPerByteL .~ icMinFeeRefScriptCostPerByte
 
 
 createEraBasedProtocolParamUpdate