diff --git a/server.go b/server.go
index d25bca654..d9552372f 100644
--- a/server.go
+++ b/server.go
@@ -31,7 +31,7 @@ type Server struct {
 
 	streamCallback StreamCallback
 
-	newSession func(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback CloseCallback) packetHandler
+	newSession func(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback closeCallback) packetHandler
 }
 
 // NewServer makes a new server
diff --git a/server_test.go b/server_test.go
index be892fcea..3e548b614 100644
--- a/server_test.go
+++ b/server_test.go
@@ -25,7 +25,7 @@ func (s *mockSession) HandlePacket(addr interface{}, hdr *publicHeader, data []b
 func (s *mockSession) Run() {
 }
 
-func newMockSession(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback CloseCallback) packetHandler {
+func newMockSession(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback closeCallback) packetHandler {
 	return &mockSession{
 		connectionID: connectionID,
 	}
diff --git a/session.go b/session.go
index ffe59ebde..8376784b5 100644
--- a/session.go
+++ b/session.go
@@ -32,15 +32,15 @@ var (
 // StreamCallback gets a stream frame and returns a reply frame
 type StreamCallback func(*Session, utils.Stream)
 
-// CloseCallback is called when a session is closed
-type CloseCallback func(id protocol.ConnectionID)
+// closeCallback is called when a session is closed
+type closeCallback func(id protocol.ConnectionID)
 
 // A Session is a QUIC session
 type Session struct {
 	connectionID protocol.ConnectionID
 
 	streamCallback StreamCallback
-	closeCallback  CloseCallback
+	closeCallback  closeCallback
 
 	conn connection
 
@@ -76,7 +76,7 @@ type Session struct {
 }
 
 // newSession makes a new session
-func newSession(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback CloseCallback) packetHandler {
+func newSession(conn connection, v protocol.VersionNumber, connectionID protocol.ConnectionID, sCfg *handshake.ServerConfig, streamCallback StreamCallback, closeCallback closeCallback) packetHandler {
 	stopWaitingManager := ackhandler.NewStopWaitingManager()
 	session := &Session{
 		connectionID:                connectionID,