diff --git a/beacon_chain/gossip_processing/block_processor.nim b/beacon_chain/gossip_processing/block_processor.nim
index bb7f7fd29..d5414da77 100644
--- a/beacon_chain/gossip_processing/block_processor.nim
+++ b/beacon_chain/gossip_processing/block_processor.nim
@@ -173,7 +173,7 @@ from ../consensus_object_pools/block_clearance import
 proc storeBackfillBlock(
     self: var BlockProcessor,
     signedBlock: ForkySignedBeaconBlock,
-    blobsOpt: Opt[ForkyBlobSidecars]
+    blobsOpt: OptForkyBlobSidecars
 ): Result[void, VerifierError] =
   const
     consensusFork = typeof(signedBlock).kind
@@ -441,7 +441,7 @@ proc enqueueBlock*(
 proc storeBlock(
     self: ref BlockProcessor, src: MsgSource, wallTime: BeaconTime,
     signedBlock: ForkySignedBeaconBlock,
-    blobsOpt: Opt[ForkyBlobSidecars],
+    blobsOpt: OptForkyBlobSidecars,
     maybeFinalized = false,
     queueTick: Moment = Moment.now(),
     validationDur = Duration()
diff --git a/beacon_chain/spec/forks.nim b/beacon_chain/spec/forks.nim
index 3262070e0..f0c749a2d 100644
--- a/beacon_chain/spec/forks.nim
+++ b/beacon_chain/spec/forks.nim
@@ -283,6 +283,9 @@ type
   ForkyBlobSidecars* =
     deneb.BlobSidecars
 
+  OptForkyBlobSidecars* =
+    Opt[deneb.BlobSidecars]
+
   ForkedBlobSidecar* = object
     case kind*: BlobFork
     of BlobFork.Deneb: