diff --git a/rollup/internal/controller/relayer/l2_relayer.go b/rollup/internal/controller/relayer/l2_relayer.go
index 0b8eae7cd..fa4305895 100644
--- a/rollup/internal/controller/relayer/l2_relayer.go
+++ b/rollup/internal/controller/relayer/l2_relayer.go
@@ -346,7 +346,7 @@ func (r *Layer2Relayer) ProcessGasPriceOracle() {
 
 		// last is undefine or (suggestGasPriceUint64 >= minGasPrice && exceed diff)
 		if r.lastGasPrice == 0 || (suggestGasPriceUint64 >= r.minGasPrice &&
-			(math.Abs(float64(suggestGasPriceUint64)-float64(lastGasPrice)) >= float64(expectedDelta))) {
+			(math.Abs(float64(suggestGasPriceUint64)-float64(r.lastGasPrice)) >= float64(expectedDelta))) {
 			data, err := r.l2GasOracleABI.Pack("setL2BaseFee", suggestGasPrice)
 			if err != nil {
 				log.Error("Failed to pack setL2BaseFee", "batch.Hash", batch.Hash, "GasPrice", suggestGasPrice.Uint64(), "err", err)