diff --git a/internal/ackhandler/sent_packet_handler.go b/internal/ackhandler/sent_packet_handler.go
index 83d75d8b3..d52328feb 100644
--- a/internal/ackhandler/sent_packet_handler.go
+++ b/internal/ackhandler/sent_packet_handler.go
@@ -385,15 +385,18 @@ func (h *sentPacketHandler) detectLostPackets(
 		}
 		pnSpace.history.Remove(p.PacketNumber)
 		if h.traceCallback != nil {
-			// TODO: trace frames
+			frames := make([]wire.Frame, 0, len(p.Frames))
+			for _, f := range p.Frames {
+				frames = append(frames, f.Frame)
+			}
 			h.traceCallback(quictrace.Event{
 				Time:            now,
 				EventType:       quictrace.PacketLost,
 				EncryptionLevel: p.EncryptionLevel,
 				PacketNumber:    p.PacketNumber,
 				PacketSize:      p.Length,
-				//Frames:          p.Frames,
-				TransportState: h.GetStats(),
+				Frames:          frames,
+				TransportState:  h.GetStats(),
 			})
 		}
 	}
diff --git a/session.go b/session.go
index b57723e7f..17b875ae4 100644
--- a/session.go
+++ b/session.go
@@ -1229,6 +1229,10 @@ func (s *session) sendPackedPacket(packet *packedPacket) {
 		s.firstAckElicitingPacketAfterIdleSentTime = time.Now()
 	}
 	if s.traceCallback != nil {
+		frames := make([]wire.Frame, 0, len(packet.frames))
+		for _, f := range packet.frames {
+			frames = append(frames, f.Frame)
+		}
 		s.traceCallback(quictrace.Event{
 			Time:            time.Now(),
 			EventType:       quictrace.PacketSent,
@@ -1236,8 +1240,7 @@ func (s *session) sendPackedPacket(packet *packedPacket) {
 			EncryptionLevel: packet.EncryptionLevel(),
 			PacketNumber:    packet.header.PacketNumber,
 			PacketSize:      protocol.ByteCount(len(packet.raw)),
-			// TODO: trace frames
-			// Frames:          packet.frames,
+			Frames:          frames,
 		})
 	}
 	s.logPacket(packet)