diff --git a/eth/gasprice/feehistory.go b/eth/gasprice/feehistory.go
index aafdfe9395..96266c5a15 100644
--- a/eth/gasprice/feehistory.go
+++ b/eth/gasprice/feehistory.go
@@ -219,14 +219,16 @@ func (oracle *Oracle) resolveBlockRange(ctx context.Context, reqEnd rpc.BlockNum
 // or blocks older than a certain age (specified in maxHistory). The first block of the
 // actually processed range is returned to avoid ambiguity when parts of the requested range
 // are not available or when the head has changed during processing this request.
-// Three arrays are returned based on the processed blocks:
+// Five arrays are returned based on the processed blocks:
 //   - reward: the requested percentiles of effective priority fees per gas of transactions in each
 //     block, sorted in ascending order and weighted by gas used.
 //   - baseFee: base fee per gas in the given block
 //   - gasUsedRatio: gasUsed/gasLimit in the given block
+//   - blobBaseFee: the blob base fee per gas in the given block
+//   - blobGasUsedRatio: blobGasUsed/blobGasLimit in the given block
 //
-// Note: baseFee includes the next block after the newest of the returned range, because this
-// value can be derived from the newest block.
+// Note: baseFee and blobBaseFee both include the next block after the newest of the returned range,
+// because this value can be derived from the newest block.
 func (oracle *Oracle) FeeHistory(ctx context.Context, blocks uint64, unresolvedLastBlock rpc.BlockNumber, rewardPercentiles []float64) (*big.Int, [][]*big.Int, []*big.Int, []float64, []*big.Int, []float64, error) {
 	if blocks < 1 {
 		return common.Big0, nil, nil, nil, nil, nil, nil // returning with no data and no error means there are no retrievable blocks