diff --git a/internal/ackhandler/cc_adapter.go b/internal/ackhandler/cc_adapter.go
index fa0cebf6ccd..659ab83495a 100644
--- a/internal/ackhandler/cc_adapter.go
+++ b/internal/ackhandler/cc_adapter.go
@@ -8,7 +8,10 @@ import (
 	"github.com/quic-go/quic-go/internal/protocol"
 )
 
-var _ cgInternal.SendAlgorithmEx = &ccAdapter{}
+var (
+	_ cgInternal.SendAlgorithmEx             = &ccAdapter{}
+	_ cgInternal.SendAlgorithmWithDebugInfos = &ccAdapter{}
+)
 
 type ccAdapter struct {
 	CC congestion.CongestionControl
diff --git a/internal/congestion/interface.go b/internal/congestion/interface.go
index da052159e66..54fcbbea35b 100644
--- a/internal/congestion/interface.go
+++ b/internal/congestion/interface.go
@@ -20,6 +20,11 @@ type SendAlgorithm interface {
 	SetMaxDatagramSize(protocol.ByteCount)
 }
 
+type SendAlgorithmEx interface {
+	SendAlgorithm
+	OnCongestionEventEx(priorInFlight protocol.ByteCount, eventTime time.Time, ackedPackets []congestion.AckedPacketInfo, lostPackets []congestion.LostPacketInfo)
+}
+
 // A SendAlgorithmWithDebugInfos is a SendAlgorithm that exposes some debug infos
 type SendAlgorithmWithDebugInfos interface {
 	SendAlgorithm
@@ -27,8 +32,3 @@ type SendAlgorithmWithDebugInfos interface {
 	InRecovery() bool
 	GetCongestionWindow() protocol.ByteCount
 }
-
-type SendAlgorithmEx interface {
-	SendAlgorithmWithDebugInfos
-	OnCongestionEventEx(priorInFlight protocol.ByteCount, eventTime time.Time, ackedPackets []congestion.AckedPacketInfo, lostPackets []congestion.LostPacketInfo)
-}