diff --git a/consensus/misc/eip4844/eip4844.go b/consensus/misc/eip4844/eip4844.go
index d453ecf085..10bc48d9c8 100644
--- a/consensus/misc/eip4844/eip4844.go
+++ b/consensus/misc/eip4844/eip4844.go
@@ -76,7 +76,7 @@ func CalcExcessBlobGas(config *params.ChainConfig, parent *types.Header, headTim
 	if excessBlobGas < targetGas {
 		return 0
 	}
-	if config.IsOsaka(new(big.Int).Add(big.NewInt(1), parent.Number), headTimestamp) {
+	if config.IsOsaka(new(big.Int).Add(parent.Number, big.NewInt(1)), headTimestamp) {
 		return excessBlobGas / 3
 	}
 	return excessBlobGas - targetGas