diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/MainnetEvmRegistries.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/MainnetEvmRegistries.java
index af955bf0174..0eda95bee70 100644
--- a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/MainnetEvmRegistries.java
+++ b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/MainnetEvmRegistries.java
@@ -155,7 +155,6 @@ static EVM london(final GasCalculator gasCalculator, final BigInteger chainId) {
   private static void registerFrontierOpcodes(
       final OperationRegistry registry, final GasCalculator gasCalculator) {
     registry.put(new AddOperation(gasCalculator));
-    registry.put(new AddOperation(gasCalculator));
     registry.put(new MulOperation(gasCalculator));
     registry.put(new SubOperation(gasCalculator));
     registry.put(new DivOperation(gasCalculator));