diff --git a/dialer.go b/dialer.go
index e28cf85..04fa466 100644
--- a/dialer.go
+++ b/dialer.go
@@ -114,6 +114,10 @@ func (s *Dialer) DialContext(ctx context.Context, network string, address string
 
 func (s *Dialer) DialUDP() (net.PacketConn, error) {
 	conn, err := s.DialContext(context.Background(), "udp", "")
+	if conn == nil {
+		return nil, err
+	}
+
 	return conn.(net.PacketConn), err
 }