diff --git a/packages/beacon-node/src/chain/chain.ts b/packages/beacon-node/src/chain/chain.ts
index 01c14ce3b5..a42a4e21db 100644
--- a/packages/beacon-node/src/chain/chain.ts
+++ b/packages/beacon-node/src/chain/chain.ts
@@ -1298,9 +1298,9 @@ export class BeaconChain implements IBeaconChain {
 
     preState = processSlots(preState, block.slot); // Dial preState's slot to block.slot
 
-    const postState = this.regen.getStateSync(toRootHex(block.stateRoot)) ?? undefined;
+    const proposerRewards = this.regen.getStateSync(toRootHex(block.stateRoot))?.proposerRewards ?? undefined;
 
-    return computeBlockRewards(this.config, block, preState, postState);
+    return computeBlockRewards(this.config, block, preState, proposerRewards);
   }
 
   async getAttestationsRewards(
diff --git a/packages/state-transition/src/rewards/blockRewards.ts b/packages/state-transition/src/rewards/blockRewards.ts
index 591b8b0855..d455595aae 100644
--- a/packages/state-transition/src/rewards/blockRewards.ts
+++ b/packages/state-transition/src/rewards/blockRewards.ts
@@ -7,6 +7,7 @@ import {
 } from "@lodestar/params";
 import {BeaconBlock, altair, phase0, rewards} from "@lodestar/types";
 import {processAttestationsAltair} from "../block/processAttestationsAltair.js";
+import {RewardCache} from "../cache/rewardCache.js";
 import {CachedBeaconStateAllForks, CachedBeaconStateAltair, CachedBeaconStatePhase0} from "../cache/stateCache.js";
 import {getAttesterSlashableIndices} from "../util/attestation.js";
 
@@ -24,14 +25,13 @@ export async function computeBlockRewards(
   config: BeaconConfig,
   block: BeaconBlock,
   preStateIn: CachedBeaconStateAllForks,
-  postStateIn?: CachedBeaconStateAllForks
+  proposerRewards?: RewardCache
 ): Promise<rewards.BlockRewards> {
   const preState = preStateIn.clone();
-  const postState = postStateIn?.clone();
 
   const fork = config.getForkName(block.slot);
   const {attestations: cachedAttestationsReward = 0, syncAggregate: cachedSyncAggregateReward = 0} =
-    postState?.proposerRewards ?? {};
+    proposerRewards ?? {};
   let blockAttestationReward = cachedAttestationsReward;
   let syncAggregateReward = cachedSyncAggregateReward;
 
diff --git a/packages/state-transition/test/unit/rewards/blockRewards.test.ts b/packages/state-transition/test/unit/rewards/blockRewards.test.ts
index 522e494c51..dfdf8a4ee5 100644
--- a/packages/state-transition/test/unit/rewards/blockRewards.test.ts
+++ b/packages/state-transition/test/unit/rewards/blockRewards.test.ts
@@ -151,13 +151,13 @@ describe("chain / rewards / blockRewards", () => {
 
     // Set postState's reward cache
     const rewardCache = postState.proposerRewards; // Grab original reward cache before overwritten
-    postState.proposerRewards = {attestations: 1000, syncAggregate: 1001, slashing: 1002};
+    const proposerRewards = {attestations: 1000, syncAggregate: 1001, slashing: 1002};
 
     const calculatedBlockReward = await computeBlockRewards(
       config,
       block.message,
       preState as CachedBeaconStateAllForks,
-      postState
+      proposerRewards
     );
     const {proposerIndex, total, attestations, syncAggregate, proposerSlashings, attesterSlashings} =
       calculatedBlockReward;