diff --git a/constants.py b/constants.py
index 02576b4..981a1e5 100644
--- a/constants.py
+++ b/constants.py
@@ -38,6 +38,7 @@ class XMLTV:
         if 'stereo' in attr: programme += '<audio><stereo>stereo</stereo></audio>'
         if 'mono' in attr: programme += '<audio><stereo>mono</stereo></audio>'
         if 'hd' in attr: programme += '<video><present>yes</present><aspect>16:9</aspect><quality>HDTV</quality></video>'
+        if '4k' in attr: programme += '<video><present>yes></present><aspect>16:9</aspect><quality>3840x2160</quality></video>'
         if 'cp1' in attr: programme += '<subtitles type="teletext" />'
         programme += '</programme>\n'