diff --git a/beacon/types/exec_payload.go b/beacon/types/exec_payload.go
index 4448f854ad..b159687dfc 100644
--- a/beacon/types/exec_payload.go
+++ b/beacon/types/exec_payload.go
@@ -65,7 +65,7 @@ func convertPayload[T payloadType](payload T, parentRoot *zrntcommon.Root) (*typ
 
 	block := types.NewBlockWithHeader(&header).WithBody(types.Body{Transactions: transactions, Withdrawals: withdrawals})
 	if hash := block.Hash(); hash != expectedHash {
-		return nil, fmt.Errorf("Sanity check failed, payload hash does not match (expected %x, got %x)", expectedHash, hash)
+		return nil, fmt.Errorf("sanity check failed, payload hash does not match (expected %x, got %x)", expectedHash, hash)
 	}
 	return block, nil
 }