diff --git a/beacon-chain/blockchain/error.go b/beacon-chain/blockchain/error.go
index 35630eb139b0..206030fdc2e2 100644
--- a/beacon-chain/blockchain/error.go
+++ b/beacon-chain/blockchain/error.go
@@ -2,8 +2,10 @@ package blockchain
 
 import (
 	stderrors "errors"
+	"fmt"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/verification"
+	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/pkg/errors"
 )
 
@@ -48,6 +50,11 @@ var (
 	errBlockBeingSynced = errors.New("block is being synced")
 )
 
+// ErrRootNotInForkchoice is returned when a root cannot be found in forkchoice.
+func ErrRootNotInForkchoice(root [fieldparams.RootLength]byte) invalidBlock {
+	return invalidBlock{error: fmt.Errorf("root %#x not in forkchoice", root), root: root}
+}
+
 // An invalid block is the block that fails state transition based on the core protocol rules.
 // The beacon node shall not be accepting nor building blocks that branch off from an invalid block.
 // Some examples of invalid blocks are:
diff --git a/beacon-chain/blockchain/process_block_helpers.go b/beacon-chain/blockchain/process_block_helpers.go
index 9e15c5671982..2bf235f905f2 100644
--- a/beacon-chain/blockchain/process_block_helpers.go
+++ b/beacon-chain/blockchain/process_block_helpers.go
@@ -401,7 +401,7 @@ func (s *Service) fillInForkChoiceMissingBlocks(ctx context.Context, signed inte
 		return nil
 	}
 	if root != s.ensureRootNotZeros(finalized.Root) && !s.cfg.ForkChoiceStore.HasNode(root) {
-		return ErrNotDescendantOfFinalized
+		return ErrRootNotInForkchoice(root)
 	}
 	slices.Reverse(pendingNodes)
 	return s.cfg.ForkChoiceStore.InsertChain(ctx, pendingNodes)
diff --git a/beacon-chain/blockchain/process_block_test.go b/beacon-chain/blockchain/process_block_test.go
index 1494d3da8e0c..bfba072155ef 100644
--- a/beacon-chain/blockchain/process_block_test.go
+++ b/beacon-chain/blockchain/process_block_test.go
@@ -374,7 +374,7 @@ func TestFillForkChoiceMissingBlocks_FinalizedSibling(t *testing.T) {
 
 	err = service.fillInForkChoiceMissingBlocks(
 		t.Context(), wsb, beaconState.FinalizedCheckpoint(), beaconState.CurrentJustifiedCheckpoint())
-	require.Equal(t, ErrNotDescendantOfFinalized.Error(), err.Error())
+	require.Equal(t, ErrRootNotInForkchoice(bytesutil.ToBytes32(roots[8])), err.Error())
 }
 
 func TestFillForkChoiceMissingBlocks_ErrorCases(t *testing.T) {
diff --git a/beacon-chain/blockchain/receive_block.go b/beacon-chain/blockchain/receive_block.go
index 00064234b706..3b22a4f54dfa 100644
--- a/beacon-chain/blockchain/receive_block.go
+++ b/beacon-chain/blockchain/receive_block.go
@@ -507,7 +507,7 @@ func (s *Service) validateStateTransition(ctx context.Context, preState state.Be
 	// Verify that the parent block is in forkchoice
 	parentRoot := b.ParentRoot()
 	if !s.InForkchoice(parentRoot) {
-		return nil, ErrNotDescendantOfFinalized
+		return nil, ErrRootNotInForkchoice(parentRoot)
 	}
 	stateTransitionStartTime := time.Now()
 	postState, err := transition.ExecuteStateTransition(ctx, preState, signed)
diff --git a/beacon-chain/sync/pending_attestations_queue.go b/beacon-chain/sync/pending_attestations_queue.go
index 64c0033ad11d..bde336ba7f13 100644
--- a/beacon-chain/sync/pending_attestations_queue.go
+++ b/beacon-chain/sync/pending_attestations_queue.go
@@ -118,7 +118,7 @@ func (s *Service) processAttestationBucket(ctx context.Context, bucket *attestat
 
 	// Shared validations for the entire bucket.
 	if !s.cfg.chain.InForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)) {
-		log.WithError(blockchain.ErrNotDescendantOfFinalized).WithField("root", fmt.Sprintf("%#x", data.BeaconBlockRoot)).Debug("Failed forkchoice check for bucket")
+		log.WithError(blockchain.ErrRootNotInForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot))).Debug("Failed forkchoice check for bucket")
 		return
 	}
 
diff --git a/beacon-chain/sync/validate_aggregate_proof.go b/beacon-chain/sync/validate_aggregate_proof.go
index 0f64ab462d1e..e321657a5ba2 100644
--- a/beacon-chain/sync/validate_aggregate_proof.go
+++ b/beacon-chain/sync/validate_aggregate_proof.go
@@ -167,8 +167,8 @@ func (s *Service) validateAggregatedAtt(ctx context.Context, signed ethpb.Signed
 
 	// Verify current finalized checkpoint is an ancestor of the block defined by the attestation's beacon block root.
 	if !s.cfg.chain.InForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)) {
-		tracing.AnnotateError(span, blockchain.ErrNotDescendantOfFinalized)
-		return pubsub.ValidationIgnore, blockchain.ErrNotDescendantOfFinalized
+		tracing.AnnotateError(span, blockchain.ErrRootNotInForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)))
+		return pubsub.ValidationIgnore, blockchain.ErrRootNotInForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot))
 	}
 
 	bs, err := s.cfg.chain.AttestationTargetState(ctx, data.Target)
diff --git a/beacon-chain/sync/validate_beacon_attestation.go b/beacon-chain/sync/validate_beacon_attestation.go
index aee654cf0f33..4843f5af8939 100644
--- a/beacon-chain/sync/validate_beacon_attestation.go
+++ b/beacon-chain/sync/validate_beacon_attestation.go
@@ -121,8 +121,8 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(
 	}
 	// Block exists - verify it's in forkchoice (i.e., it's a descendant of the finalized checkpoint)
 	if !s.cfg.chain.InForkchoice(blockRoot) {
-		tracing.AnnotateError(span, blockchain.ErrNotDescendantOfFinalized)
-		return pubsub.ValidationIgnore, blockchain.ErrNotDescendantOfFinalized
+		tracing.AnnotateError(span, blockchain.ErrRootNotInForkchoice(blockRoot))
+		return pubsub.ValidationIgnore, blockchain.ErrRootNotInForkchoice(blockRoot)
 	}
 	if err = s.cfg.chain.VerifyLmdFfgConsistency(ctx, att); err != nil {
 		tracing.AnnotateError(span, err)
diff --git a/beacon-chain/sync/validate_beacon_blocks.go b/beacon-chain/sync/validate_beacon_blocks.go
index 8418ff98191b..b0246692bb1e 100644
--- a/beacon-chain/sync/validate_beacon_blocks.go
+++ b/beacon-chain/sync/validate_beacon_blocks.go
@@ -285,7 +285,7 @@ func (s *Service) validateBeaconBlock(ctx context.Context, blk interfaces.ReadOn
 func (s *Service) validatePhase0Block(ctx context.Context, blk interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte) (state.BeaconState, error) {
 	if !s.cfg.chain.InForkchoice(blk.Block().ParentRoot()) {
 		s.setBadBlock(ctx, blockRoot)
-		return nil, blockchain.ErrNotDescendantOfFinalized
+		return nil, blockchain.ErrRootNotInForkchoice(blk.Block().ParentRoot())
 	}
 
 	parentState, err := s.cfg.stateGen.StateByRoot(ctx, blk.Block().ParentRoot())
diff --git a/changelog/james-prysm_change-p2p-forkchoice-error.md b/changelog/james-prysm_change-p2p-forkchoice-error.md
new file mode 100644
index 000000000000..d5be66cdce55
--- /dev/null
+++ b/changelog/james-prysm_change-p2p-forkchoice-error.md
@@ -0,0 +1,3 @@
+### Changed
+
+- changed ErrNotDescendantOfFinalized to ErrRootNotInForkChoice.
\ No newline at end of file