webtorrent/tracker-client.go |  1 +
 webtorrent/transport.go      | 10 ++++++++--

diff --git a/webtorrent/tracker-client.go b/webtorrent/tracker-client.go
index 311b296a8965d37cbf14f91c060c575cd9a649e4..b0ca6c2c35289de8bcb89864fc4e1a1db2cf33b2 100644
--- a/webtorrent/tracker-client.go
+++ b/webtorrent/tracker-client.go
@@ -191,6 +191,7 @@
 func (tc *TrackerClient) closeUnusedOffers() {
 	for _, offer := range tc.outboundOffers {
 		offer.peerConnection.Close()
+		offer.dataChannel.Close()
 	}
 	tc.outboundOffers = nil
 }
diff --git a/webtorrent/transport.go b/webtorrent/transport.go
index da56e40d1a2ef1d9ec34d8b0ca780c489d139b3b..852990860e00d9e27b0b4a81d26a2d4c90647e64 100644
--- a/webtorrent/transport.go
+++ b/webtorrent/transport.go
@@ -232,13 +232,18 @@ 		if err != nil {
 			// This shouldn't happen if the API is configured correctly, and we call from OnOpen.
 			panic(err)
 		}
-		onOpen(hookDataChannelCloser(raw, pc, span), ctx, span)
+		onOpen(hookDataChannelCloser(raw, pc, span, dc), ctx, span)
 	})
 }
 
 // Hooks the datachannel's Close to Close the owning PeerConnection. The datachannel takes ownership
 // and responsibility for the PeerConnection.
-func hookDataChannelCloser(dcrwc datachannel.ReadWriteCloser, pc *wrappedPeerConnection, dataChannelSpan trace.Span) datachannel.ReadWriteCloser {
+func hookDataChannelCloser(
+	dcrwc datachannel.ReadWriteCloser,
+	pc *wrappedPeerConnection,
+	dataChannelSpan trace.Span,
+	originalDataChannel *webrtc.DataChannel,
+) datachannel.ReadWriteCloser {
 	return struct {
 		datachannelReadWriter
 		io.Closer
@@ -247,6 +252,7 @@ 		dcrwc,
 		ioCloserFunc(func() error {
 			dcrwc.Close()
 			pc.Close()
+			originalDataChannel.Close()
 			dataChannelSpan.End()
 			return nil
 		}),