diff --git a/src/core/core.go b/src/core/core.go
index dfc18704..8907dd05 100644
--- a/src/core/core.go
+++ b/src/core/core.go
@@ -184,7 +184,7 @@ func (c *Core) MTU() uint64 {
 
 func (c *Core) ReadFrom(p []byte) (n int, from net.Addr, err error) {
 	buf := allocBytes(int(c.PacketConn.MTU()))
-	defer freeBytes(buf)
+	defer freeBytes(buf) //nolint:staticcheck
 	for {
 		bs := buf
 		n, from, err = c.PacketConn.ReadFrom(bs)
@@ -219,7 +219,7 @@ func (c *Core) ReadFrom(p []byte) (n int, from net.Addr, err error) {
 
 func (c *Core) WriteTo(p []byte, addr net.Addr) (n int, err error) {
 	buf := allocBytes(0)
-	defer freeBytes(buf)
+	defer freeBytes(buf) //nolint:staticcheck
 	buf = append(buf, typeSessionTraffic)
 	buf = append(buf, p...)
 	n, err = c.PacketConn.WriteTo(buf, addr)