diff --git a/qlog/event.go b/qlog/event.go
index 612103cd7..09fa8a744 100644
--- a/qlog/event.go
+++ b/qlog/event.go
@@ -329,6 +329,7 @@ type eventTransportParameters struct {
 
 	OriginalDestinationConnectionID protocol.ConnectionID
 	InitialSourceConnectionID       protocol.ConnectionID
+	RetrySourceConnectionID         *protocol.ConnectionID
 
 	StatelessResetToken     *[16]byte
 	DisableActiveMigration  bool
@@ -359,6 +360,9 @@ func (e eventTransportParameters) MarshalJSONObject(enc *gojay.Encoder) {
 		if e.StatelessResetToken != nil {
 			enc.StringKey("stateless_reset_token", fmt.Sprintf("%x", e.StatelessResetToken[:]))
 		}
+		if e.RetrySourceConnectionID != nil {
+			enc.StringKey("retry_source_connection_id", connectionID(*e.RetrySourceConnectionID).String())
+		}
 	}
 	enc.StringKey("initial_source_connection_id", connectionID(e.InitialSourceConnectionID).String())
 	enc.BoolKey("disable_active_migration", e.DisableActiveMigration)
diff --git a/qlog/qlog.go b/qlog/qlog.go
index 0f6bbf904..889dc9a6a 100644
--- a/qlog/qlog.go
+++ b/qlog/qlog.go
@@ -180,6 +180,7 @@ func (t *tracer) recordTransportParameters(sentBy protocol.Perspective, tp *wire
 		SentBy:                          sentBy,
 		OriginalDestinationConnectionID: tp.OriginalDestinationConnectionID,
 		InitialSourceConnectionID:       tp.InitialSourceConnectionID,
+		RetrySourceConnectionID:         tp.RetrySourceConnectionID,
 		StatelessResetToken:             tp.StatelessResetToken,
 		DisableActiveMigration:          tp.DisableActiveMigration,
 		MaxIdleTimeout:                  tp.MaxIdleTimeout,
diff --git a/qlog/qlog_test.go b/qlog/qlog_test.go
index 251374431..2f5902743 100644
--- a/qlog/qlog_test.go
+++ b/qlog/qlog_test.go
@@ -185,6 +185,7 @@ var _ = Describe("Tracer", func() {
 				StatelessResetToken:             &[16]byte{0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00},
 				OriginalDestinationConnectionID: protocol.ConnectionID{0xde, 0xad, 0xc0, 0xde},
 				InitialSourceConnectionID:       protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef},
+				RetrySourceConnectionID:         &protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad},
 				ActiveConnectionIDLimit:         7,
 			})
 			entry := exportAndParseSingle()
@@ -195,6 +196,7 @@ var _ = Describe("Tracer", func() {
 			Expect(ev).To(HaveKeyWithValue("owner", "local"))
 			Expect(ev).To(HaveKeyWithValue("original_destination_connection_id", "deadc0de"))
 			Expect(ev).To(HaveKeyWithValue("initial_source_connection_id", "deadbeef"))
+			Expect(ev).To(HaveKeyWithValue("retry_source_connection_id", "decafbad"))
 			Expect(ev).To(HaveKeyWithValue("stateless_reset_token", "112233445566778899aabbccddeeff00"))
 			Expect(ev).To(HaveKeyWithValue("max_idle_timeout", float64(321)))
 			Expect(ev).To(HaveKeyWithValue("max_udp_payload_size", float64(1234)))
@@ -221,6 +223,19 @@ var _ = Describe("Tracer", func() {
 			Expect(ev).ToNot(HaveKey("stateless_reset_token"))
 		})
 
+		It("records transport parameters without retry_source_connection_id", func() {
+			tracer.SentTransportParameters(&wire.TransportParameters{
+				StatelessResetToken: &[16]byte{0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00},
+			})
+			entry := exportAndParseSingle()
+			Expect(entry.Time).To(BeTemporally("~", time.Now(), scaleDuration(10*time.Millisecond)))
+			Expect(entry.Category).To(Equal("transport"))
+			Expect(entry.Name).To(Equal("parameters_set"))
+			ev := entry.Event
+			Expect(ev).To(HaveKeyWithValue("owner", "local"))
+			Expect(ev).ToNot(HaveKey("retry_source_connection_id"))
+		})
+
 		It("records received transport parameters", func() {
 			tracer.ReceivedTransportParameters(&wire.TransportParameters{})
 			entry := exportAndParseSingle()