diff --git a/packages/beacon-node/src/api/impl/beacon/pool/index.ts b/packages/beacon-node/src/api/impl/beacon/pool/index.ts
index 36f22badc0ad..e82432c81707 100644
--- a/packages/beacon-node/src/api/impl/beacon/pool/index.ts
+++ b/packages/beacon-node/src/api/impl/beacon/pool/index.ts
@@ -99,13 +99,13 @@ export function getBeaconPoolApi({
             // when a validator is configured with multiple beacon node urls, this attestation data may come from another beacon node
             // and the block hasn't been in our forkchoice since we haven't seen / processing that block
             // see https://github.com/ChainSafe/lodestar/issues/5098
-            const {indexedAttestation, subnet, attDataRootHex, committeeIndex, participationIndex} =
+            const {indexedAttestation, subnet, attDataRootHex, committeeIndex, committeeValidatorIndex} =
               await validateGossipFnRetryUnknownRoot(validateFn, network, chain, slot, beaconBlockRoot);
 
             if (network.shouldAggregate(subnet, slot)) {
               const insertOutcome = chain.attestationPool.add(
                 committeeIndex,
-                participationIndex,
+                committeeValidatorIndex,
                 attestation,
                 attDataRootHex
               );
diff --git a/packages/beacon-node/src/chain/opPools/attestationPool.ts b/packages/beacon-node/src/chain/opPools/attestationPool.ts
index 3bf3a78a21c6..b52853195cea 100644
--- a/packages/beacon-node/src/chain/opPools/attestationPool.ts
+++ b/packages/beacon-node/src/chain/opPools/attestationPool.ts
@@ -107,7 +107,7 @@ export class AttestationPool {
    */
   add(
     committeeIndex: CommitteeIndex,
-    participationIndex: number,
+    committeeValidatorIndex: number,
     attestation: Attestation,
     attDataRootHex: RootHex
   ): InsertOutcome {
@@ -149,7 +149,7 @@ export class AttestationPool {
     const aggregate = aggregateByIndex.get(committeeIndex);
     if (aggregate) {
       // Aggregate mutating
-      return aggregateAttestationInto(aggregate, attestation, participationIndex);
+      return aggregateAttestationInto(aggregate, attestation, committeeValidatorIndex);
     }
     // Create new aggregate
     aggregateByIndex.set(committeeIndex, attestationToAggregate(attestation));
diff --git a/packages/beacon-node/src/chain/validation/attestation.ts b/packages/beacon-node/src/chain/validation/attestation.ts
index e1818b276af5..8fb51a13b6e4 100644
--- a/packages/beacon-node/src/chain/validation/attestation.ts
+++ b/packages/beacon-node/src/chain/validation/attestation.ts
@@ -61,7 +61,7 @@ export type AttestationValidationResult = {
   subnet: number;
   attDataRootHex: RootHex;
   committeeIndex: CommitteeIndex;
-  participationIndex: number;
+  committeeValidatorIndex: number;
 };
 
 export type AttestationOrBytes = ApiAttestation | GossipAttestation;
@@ -506,7 +506,7 @@ async function validateAttestationNoSignatureCheck(
     signatureSet,
     validatorIndex,
     committeeIndex,
-    participationIndex: bitIndex,
+    committeeValidatorIndex: bitIndex,
   };
 }
 
diff --git a/packages/beacon-node/src/network/processor/gossipHandlers.ts b/packages/beacon-node/src/network/processor/gossipHandlers.ts
index 4063dcdcf135..6fce64866344 100644
--- a/packages/beacon-node/src/network/processor/gossipHandlers.ts
+++ b/packages/beacon-node/src/network/processor/gossipHandlers.ts
@@ -633,7 +633,7 @@ function getBatchHandlers(modules: ValidatorFnsModules, options: GossipHandlerOp
         results.push(null);
 
         // Handler
-        const {indexedAttestation, attDataRootHex, attestation, committeeIndex, participationIndex} =
+        const {indexedAttestation, attDataRootHex, attestation, committeeIndex, committeeValidatorIndex} =
           validationResult.result;
         metrics?.registerGossipUnaggregatedAttestation(gossipHandlerParams[i].seenTimestampSec, indexedAttestation);
 
@@ -643,7 +643,7 @@ function getBatchHandlers(modules: ValidatorFnsModules, options: GossipHandlerOp
           if (aggregatorTracker.shouldAggregate(subnet, indexedAttestation.data.slot)) {
             const insertOutcome = chain.attestationPool.add(
               committeeIndex,
-              participationIndex,
+              committeeValidatorIndex,
               attestation,
               attDataRootHex
             );