peerconn.go | 8 +++++++-

diff --git a/peerconn.go b/peerconn.go
index 27d34ee55b7545f419ebe901b216487ed23328c1..289b2fdf4e102c82ebfb41302c6c79f22b40c570 100644
--- a/peerconn.go
+++ b/peerconn.go
@@ -648,7 +648,9 @@ 	if me.cancelledRequests.Contains(r) {
 		// Already cancelled and waiting for a response.
 		return true
 	}
-	if me.fastEnabled() {
+	// Transmission does not send rejects for received cancels. See
+	// https://github.com/transmission/transmission/pull/2275.
+	if me.fastEnabled() && !me.remoteIsTransmission() {
 		me.cancelledRequests.Add(r)
 	} else {
 		if !me.deleteRequest(r) {
@@ -1688,3 +1690,7 @@
 func (pc *PeerConn) isLowOnRequests() bool {
 	return pc.actualRequestState.Requests.IsEmpty()
 }
+
+func (pc *PeerConn) remoteIsTransmission() bool {
+	return bytes.HasPrefix(pc.PeerID[:], []byte("-TR")) && pc.PeerID[7] == '-'
+}