diff --git a/chain/exchange/client.go b/chain/exchange/client.go
index b1e97292f..2c5b39b94 100644
--- a/chain/exchange/client.go
+++ b/chain/exchange/client.go
@@ -397,14 +397,14 @@ func (c *client) sendRequestToPeer(ctx context.Context, peer peer.ID, req *Reque
 	}()
 	// -- TRACE --
 
-	supported, err := c.host.Peerstore().SupportsProtocols(peer, BlockSyncProtocolID, ChainExchangeProtocolID)
+	supported, err := c.host.Peerstore().SupportsProtocols(peer, ChainExchangeProtocolID)
 	if err != nil {
 		c.RemovePeer(peer)
 		return nil, xerrors.Errorf("failed to get protocols for peer: %w", err)
 	}
-	if len(supported) == 0 || (supported[0] != BlockSyncProtocolID && supported[0] != ChainExchangeProtocolID) {
+	if len(supported) == 0 || (supported[0] != ChainExchangeProtocolID) {
 		return nil, xerrors.Errorf("peer %s does not support protocols %s",
-			peer, []string{BlockSyncProtocolID, ChainExchangeProtocolID})
+			peer, []string{ChainExchangeProtocolID})
 	}
 
 	connectionStart := build.Clock.Now()
@@ -413,7 +413,7 @@ func (c *client) sendRequestToPeer(ctx context.Context, peer peer.ID, req *Reque
 	stream, err := c.host.NewStream(
 		network.WithNoDial(ctx, "should already have connection"),
 		peer,
-		ChainExchangeProtocolID, BlockSyncProtocolID)
+		ChainExchangeProtocolID)
 	if err != nil {
 		c.RemovePeer(peer)
 		return nil, xerrors.Errorf("failed to open stream to peer: %w", err)
diff --git a/chain/exchange/protocol.go b/chain/exchange/protocol.go
index d0977e54c..2df9dc959 100644
--- a/chain/exchange/protocol.go
+++ b/chain/exchange/protocol.go
@@ -16,10 +16,6 @@ import (
 var log = logging.Logger("chainxchg")
 
 const (
-	// BlockSyncProtocolID is the protocol ID of the former blocksync protocol.
-	// Deprecated.
-	BlockSyncProtocolID = "/fil/sync/blk/0.0.1"
-
 	// ChainExchangeProtocolID is the protocol ID of the chain exchange
 	// protocol.
 	ChainExchangeProtocolID = "/fil/chain/xchg/0.0.1"
diff --git a/node/modules/services.go b/node/modules/services.go
index 6c9a23d49..fba6dc2fd 100644
--- a/node/modules/services.go
+++ b/node/modules/services.go
@@ -98,7 +98,6 @@ func RunPeerMgr(mctx helpers.MetricsCtx, lc fx.Lifecycle, pmgr *peermgr.PeerMgr)
 }
 
 func RunChainExchange(h host.Host, svc exchange.Server) {
-	h.SetStreamHandler(exchange.BlockSyncProtocolID, svc.HandleStream)     // old
 	h.SetStreamHandler(exchange.ChainExchangeProtocolID, svc.HandleStream) // new
 }