diff --git a/eth/common/headers.nim b/eth/common/headers.nim
index 8c11256..cc265b4 100644
--- a/eth/common/headers.nim
+++ b/eth/common/headers.nim
@@ -39,6 +39,7 @@ type
     excessBlobGas*:   Opt[uint64]    # EIP-4844
     parentBeaconBlockRoot*: Opt[Hash32] # EIP-4788
     requestsRoot*:    Opt[Hash32]  # EIP-7685
+    systemLogsRoot*:  Opt[Hash32]  # Fusaka-Light
 
 # starting from EIP-4399, `mixDigest` field is called `prevRandao`
 template prevRandao*(h: Header): Bytes32 =
diff --git a/eth/rlp/writer.nim b/eth/rlp/writer.nim
index e726ddc..b8178a6 100644
--- a/eth/rlp/writer.nim
+++ b/eth/rlp/writer.nim
@@ -224,9 +224,14 @@ macro genOptionalFieldsValidation(obj: untyped, T: type, num: static[int]): unty
       doAssert(obj.withdrawalsRoot.isNone, "withdrawalsRoot needs fee")
       doAssert(obj.blobGasUsed.isNone, "blobGasUsed needs fee")
       doAssert(obj.excessBlobGas.isNone, "excessBlobGas needs fee")
+      doAssert(obj.systemLogsRoot.isNone, "systemLogsRoot needs fee")
     if obj.withdrawalsRoot.isNone:
       doAssert(obj.blobGasUsed.isNone, "blobGasUsed needs withdrawalsRoot")
       doAssert(obj.excessBlobGas.isNone, "excessBlobGas needs withdrawalsRoot")
+      doAssert(
+        obj.systemLogsRoot.isNone, "systemLogsRoot needs withdrawalsRoot")
+    if obj.blobGasUsed.isNone:
+      doAssert(obj.systemLogsRoot.isNone, "systemLogsRoot needs blobGasUsed")
     doAssert obj.blobGasUsed.isSome == obj.excessBlobGas.isSome,
       "blobGasUsed and excessBlobGas must both be present or absent"