diff --git a/packages/validator/src/services/attestationDuties.ts b/packages/validator/src/services/attestationDuties.ts
index eed42e8a5ada..30520d140011 100644
--- a/packages/validator/src/services/attestationDuties.ts
+++ b/packages/validator/src/services/attestationDuties.ts
@@ -453,6 +453,10 @@ export class AttestationDutiesService {
    * 3. Mutate duty objects to set selection proofs for aggregators
    */
   private async runDistributedAggregationSelectionTasks(duties: AttDutyAndProof[], epoch: Epoch): Promise<void> {
+    if (duties.length === 0) {
+      return;
+    }
+
     const partialSelections: routes.validator.BeaconCommitteeSelection[] = duties.map(
       ({duty, partialSelectionProof}) => ({
         validatorIndex: duty.validatorIndex,
diff --git a/packages/validator/src/services/syncCommitteeDuties.ts b/packages/validator/src/services/syncCommitteeDuties.ts
index d8494c81a90a..36151e52fee4 100644
--- a/packages/validator/src/services/syncCommitteeDuties.ts
+++ b/packages/validator/src/services/syncCommitteeDuties.ts
@@ -355,6 +355,10 @@ export class SyncCommitteeDutiesService {
    * 3. Mutate duty objects to set selection proofs for aggregators
    */
   private async runDistributedAggregationSelectionTasks(duties: SyncDutyAndProofs[], slot: number): Promise<void> {
+    if (duties.length === 0) {
+      return;
+    }
+
     const partialSelections: routes.validator.SyncCommitteeSelection[] = [];
 
     for (const {duty, selectionProofs} of duties) {