diff --git a/internal/ackhandler/interfaces.go b/internal/ackhandler/interfaces.go
index a2d660c1c..817f0d827 100644
--- a/internal/ackhandler/interfaces.go
+++ b/internal/ackhandler/interfaces.go
@@ -8,6 +8,25 @@ import (
 	"github.com/lucas-clemente/quic-go/quictrace"
 )
 
+// A Packet is a packet
+type Packet struct {
+	PacketNumber    protocol.PacketNumber
+	Frames          []wire.Frame
+	LargestAcked    protocol.PacketNumber // InvalidPacketNumber if the packet doesn't contain an ACK
+	Length          protocol.ByteCount
+	EncryptionLevel protocol.EncryptionLevel
+	SendTime        time.Time
+
+	// There are two reasons why a packet cannot be retransmitted:
+	// * it was already retransmitted
+	// * this packet is a retransmission, and we already received an ACK for the original packet
+	canBeRetransmitted      bool
+	includedInBytesInFlight bool
+	retransmittedAs         []protocol.PacketNumber
+	isRetransmission        bool // we need a separate bool here because 0 is a valid packet number
+	retransmissionOf        protocol.PacketNumber
+}
+
 // SentPacketHandler handles ACKs received for outgoing packets
 type SentPacketHandler interface {
 	// SentPacket may modify the packet
diff --git a/internal/ackhandler/packet.go b/internal/ackhandler/packet.go
deleted file mode 100644
index 0ace4d657..000000000
--- a/internal/ackhandler/packet.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package ackhandler
-
-import (
-	"time"
-
-	"github.com/lucas-clemente/quic-go/internal/protocol"
-	"github.com/lucas-clemente/quic-go/internal/wire"
-)
-
-// A Packet is a packet
-type Packet struct {
-	PacketNumber    protocol.PacketNumber
-	Frames          []wire.Frame
-	LargestAcked    protocol.PacketNumber // InvalidPacketNumber if the packet doesn't contain an ACK
-	Length          protocol.ByteCount
-	EncryptionLevel protocol.EncryptionLevel
-	SendTime        time.Time
-
-	// There are two reasons why a packet cannot be retransmitted:
-	// * it was already retransmitted
-	// * this packet is a retransmission, and we already received an ACK for the original packet
-	canBeRetransmitted      bool
-	includedInBytesInFlight bool
-	retransmittedAs         []protocol.PacketNumber
-	isRetransmission        bool // we need a separate bool here because 0 is a valid packet number
-	retransmissionOf        protocol.PacketNumber
-}