diff --git a/core/state_transition.go b/core/state_transition.go
index cb9287a82..d8d325c0a 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -290,7 +290,9 @@ func (st *StateTransition) preCheck() error {
 	}
 
 	// Make sure that transaction gasFeeCap is greater than the baseFee (post london)
-	if st.evm.ChainConfig().IsLondon(st.evm.Context.BlockNumber) {
+	// begin PluGeth injection
+	if st.evm.ChainConfig().Is1559(st.evm.Context.BlockNumber) {
+	// end PluGeth injection
 		// Skip the checks if gas fields are zero and baseFee was explicitly disabled (eth_call)
 		if !st.evm.Config.NoBaseFee || msg.GasFeeCap.BitLen() > 0 || msg.GasTipCap.BitLen() > 0 {
 			if l := msg.GasFeeCap.BitLen(); l > 256 {
@@ -433,7 +435,11 @@ func (st *StateTransition) TransitionDb() (*ExecutionResult, error) {
 	}
 	effectiveTip := msg.GasPrice
 	if rules.IsLondon {
-		effectiveTip = cmath.BigMin(msg.GasTipCap, new(big.Int).Sub(msg.GasFeeCap, st.evm.Context.BaseFee))
+		// begin PluGeth injection
+		if st.evm.ChainConfig().Is1559(st.evm.Context.BlockNumber) {
+		// end PluGeth injection
+			effectiveTip = cmath.BigMin(msg.GasTipCap, new(big.Int).Sub(msg.GasFeeCap, st.evm.Context.BaseFee))
+		}
 	}
 
 	if st.evm.Config.NoBaseFee && msg.GasFeeCap.Sign() == 0 && msg.GasTipCap.Sign() == 0 {