diff --git a/rskj-core/src/main/java/org/ethereum/core/Transaction.java b/rskj-core/src/main/java/org/ethereum/core/Transaction.java
index 655aa682555..edca4aa7d23 100644
--- a/rskj-core/src/main/java/org/ethereum/core/Transaction.java
+++ b/rskj-core/src/main/java/org/ethereum/core/Transaction.java
@@ -207,7 +207,7 @@ public long transactionCost(Constants constants, ActivationConfig.ForBlock activ
         long zeroVals = getLength(this.getData()) - nonZeroes;
 
         long transactionCost = this.isContractCreation()
-                ? GasCost.add(GasCost.TRANSACTION_CREATE_CONTRACT, InitcodeCostCalculator.getInstance().calculateCost(this.getData().length, activations))
+                ? GasCost.add(GasCost.TRANSACTION_CREATE_CONTRACT, InitcodeCostCalculator.getInstance().calculateCost(getLength(this.getData()), activations))
                 : GasCost.TRANSACTION;
 
         long txNonZeroDataCost = getTxNonZeroDataCost(activations);