diff --git a/beacon_chain/rpc/rest_beacon_api.nim b/beacon_chain/rpc/rest_beacon_api.nim
index 6569b2c2d..2d1ecd571 100644
--- a/beacon_chain/rpc/rest_beacon_api.nim
+++ b/beacon_chain/rpc/rest_beacon_api.nim
@@ -1082,7 +1082,7 @@ proc installBeaconApiHandlers*(router: var RestRouter, node: BeaconNode) =
       return RestApiResponse.jsonError(Http400, BlockIncorrectFork)
 
     withConsensusFork(currentEpochFork):
-      when consensusFork >= ConsensusFork.Capella:
+      when consensusFork >= ConsensusFork.Deneb:
         let
           restBlock = decodeBodyJsonOrSsz(
               consensusFork.SignedBlindedBeaconBlock, body).valueOr:
diff --git a/beacon_chain/rpc/rest_validator_api.nim b/beacon_chain/rpc/rest_validator_api.nim
index 64643a43f..b2f8711c2 100644
--- a/beacon_chain/rpc/rest_validator_api.nim
+++ b/beacon_chain/rpc/rest_validator_api.nim
@@ -522,7 +522,7 @@ proc installValidatorApiHandlers*(router: var RestRouter, node: BeaconNode) =
       contextFork = node.dag.cfg.consensusForkAtEpoch(node.currentSlot.epoch)
 
     withConsensusFork(contextFork):
-      when consensusFork >= ConsensusFork.Capella:
+      when consensusFork >= ConsensusFork.Deneb:
         let res = await makeBlindedBeaconBlockForHeadAndSlot[
             consensusFork.BlindedBeaconBlock](
           node, payloadBuilderClient, qrandao,
@@ -532,7 +532,7 @@ proc installValidatorApiHandlers*(router: var RestRouter, node: BeaconNode) =
         return responseVersioned(res.get().blindedBlckPart, contextFork)
       elif consensusFork >= ConsensusFork.Bellatrix:
         return RestApiResponse.jsonError(
-          Http400, "Pre-Capella builder API unsupported")
+          Http400, "Pre-Deneb builder API unsupported")
       else:
         # Pre-Bellatrix, this endpoint will return a BeaconBlock
         let res = await makeBeaconBlockForHeadAndSlot(
diff --git a/beacon_chain/spec/mev/capella_mev.nim b/beacon_chain/spec/mev/capella_mev.nim
index 6f4f790b0..dd26c8167 100644
--- a/beacon_chain/spec/mev/capella_mev.nim
+++ b/beacon_chain/spec/mev/capella_mev.nim
@@ -10,22 +10,9 @@
 import ".."/datatypes/[altair, capella]
 from stew/byteutils import to0xHex
 
-from ../datatypes/bellatrix import ExecutionAddress
 from ../eth2_merkleization import hash_tree_root
 
 type
-  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#validatorregistrationv1
-  ValidatorRegistrationV1* = object
-    fee_recipient*: ExecutionAddress
-    gas_limit*: uint64
-    timestamp*: uint64
-    pubkey*: ValidatorPubKey
-
-  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#signedvalidatorregistrationv1
-  SignedValidatorRegistrationV1* = object
-    message*: ValidatorRegistrationV1
-    signature*: ValidatorSig
-
   # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#builderbid
   # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/capella/builder.md#executionpayloadheader
   BuilderBid* = object
diff --git a/beacon_chain/spec/mev/deneb_mev.nim b/beacon_chain/spec/mev/deneb_mev.nim
index 0f6ca22db..edf9b5573 100644
--- a/beacon_chain/spec/mev/deneb_mev.nim
+++ b/beacon_chain/spec/mev/deneb_mev.nim
@@ -10,10 +10,23 @@
 import ".."/datatypes/[altair, deneb]
 
 from stew/byteutils import to0xHex
+from ../datatypes/bellatrix import ExecutionAddress
 from ".."/datatypes/capella import SignedBLSToExecutionChange
 from ".."/eth2_merkleization import hash_tree_root
 
 type
+  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#validatorregistrationv1
+  ValidatorRegistrationV1* = object
+    fee_recipient*: ExecutionAddress
+    gas_limit*: uint64
+    timestamp*: uint64
+    pubkey*: ValidatorPubKey
+
+  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#signedvalidatorregistrationv1
+  SignedValidatorRegistrationV1* = object
+    message*: ValidatorRegistrationV1
+    signature*: ValidatorSig
+
   # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/deneb/builder.md#builderbid
   BuilderBid* = object
     header*: deneb.ExecutionPayloadHeader # [Modified in Deneb]