diff --git a/packages/beacon-node/src/api/impl/beacon/state/utils.ts b/packages/beacon-node/src/api/impl/beacon/state/utils.ts
index b7af79f2d73d..bd5364199ce0 100644
--- a/packages/beacon-node/src/api/impl/beacon/state/utils.ts
+++ b/packages/beacon-node/src/api/impl/beacon/state/utils.ts
@@ -71,9 +71,11 @@ export async function getStateResponseWithRegen(
     typeof stateId === "string"
       ? await chain.getStateByStateRoot(stateId, {allowRegen: true})
       : typeof stateId === "number"
-        ? stateId >= chain.forkChoice.getFinalizedBlock().slot
-          ? await chain.getStateBySlot(stateId, {allowRegen: true})
-          : await chain.getHistoricalStateBySlot(stateId)
+        ? stateId > chain.clock.currentSlot
+          ? null // Don't try to serve future slots
+          : stateId >= chain.forkChoice.getFinalizedBlock().slot
+            ? await chain.getStateBySlot(stateId, {allowRegen: true})
+            : await chain.getHistoricalStateBySlot(stateId)
         : await chain.getStateOrBytesByCheckpoint(stateId);
 
   if (!res) {