diff --git a/transport/snell/snell.go b/transport/snell/snell.go
index c6b7a569..e2bd2820 100644
--- a/transport/snell/snell.go
+++ b/transport/snell/snell.go
@@ -241,6 +241,9 @@ func ReadPacket(r io.Reader, payload []byte) (net.Addr, int, error) {
 		return nil, 0, errors.New("remote address invalid")
 	}
 	uAddr := addr.UDPAddr()
+	if uAddr == nil {
+		return nil, 0, errors.New("parse addr error")
+	}
 
 	length := len(payload)
 	if n-headLen < length {
diff --git a/transport/trojan/trojan.go b/transport/trojan/trojan.go
index ac9f17dd..686983b5 100644
--- a/transport/trojan/trojan.go
+++ b/transport/trojan/trojan.go
@@ -170,6 +170,9 @@ func ReadPacket(r io.Reader, payload []byte) (net.Addr, int, int, error) {
 		return nil, 0, 0, errors.New("read addr error")
 	}
 	uAddr := addr.UDPAddr()
+	if uAddr == nil {
+		return nil, 0, 0, errors.New("parse addr error")
+	}
 
 	if _, err = io.ReadFull(r, payload[:2]); err != nil {
 		return nil, 0, 0, errors.New("read length error")