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--- a/upmpd/AVTransport.xml
+++ b/upmpd/AVTransport.xml
@@ -172,7 +172,8 @@
       <sendEventsAttribute>no</sendEventsAttribute>
       <dataType>string</dataType>
       <allowedValueList>
-        <allowedValue>TRACK_NR</allowedValue>
+        <allowedValue>ABS_TIME</allowedValue>
+        <allowedValue>REL_TIME</allowedValue>
       </allowedValueList>
     </stateVariable>
     <stateVariable>