diff --git a/core/arbitrum_hooks.go b/core/arbitrum_hooks.go
index 5f4b57f2d..ea93ebefc 100644
--- a/core/arbitrum_hooks.go
+++ b/core/arbitrum_hooks.go
@@ -45,8 +45,8 @@ var InterceptRPCMessage = func(
 // Gets ArbOS's maximum intended gas per second
 var GetArbOSSpeedLimitPerSecond func(statedb *state.StateDB) (uint64, error)
 
-// Allows ArbOS to update the gas cap so that it ignores the message's specific L1 poster costs.
-var PostingGasHook = func(msg *Message, header *types.Header, statedb *state.StateDB) (uint64, error) { return 0, nil }
+// While processing RPC only - Ask ArbOS what are the poster costs for this message.
+var RPCPostingGasHook = func(msg *Message, header *types.Header, statedb *state.StateDB) (uint64, error) { return 0, nil }
 
 // Renders a solidity error in human-readable form
 var RenderRPCError func(data []byte) error
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index e9125ecdd..5ce1e3d7d 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1304,7 +1304,7 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
 
 	// Arbitrum: raise the gas cap to ignore L1 costs so that it's compute-only
 	{
-		postingGas, err := core.PostingGasHook(call, header, state)
+		postingGas, err := core.RPCPostingGasHook(call, header, state)
 		if err != nil {
 			return 0, err
 		}
diff --git a/internal/ethapi/transaction_args.go b/internal/ethapi/transaction_args.go
index 3e73dba64..197584a74 100644
--- a/internal/ethapi/transaction_args.go
+++ b/internal/ethapi/transaction_args.go
@@ -492,7 +492,7 @@ func (args *TransactionArgs) ToMessage(baseFee *big.Int, globalGasCap uint64, he
 	if state != nil && !skipL1Charging {
 		// ToMessage recurses once to allow ArbOS to intercept the result for all callers
 		// ArbOS uses this to modify globalGasCap so that the cap will ignore this tx's specific L1 data costs
-		postingGas, err := core.PostingGasHook(msg, header, state)
+		postingGas, err := core.RPCPostingGasHook(msg, header, state)
 		if err == nil {
 			args.setGasUsingCap(globalGasCap + postingGas)
 			msg.GasLimit = uint64(*args.Gas)