Index: server/Slim/Formats/WMA.pm
===================================================================
--- server/Slim/Formats/WMA.pm	(revision 25502)
+++ server/Slim/Formats/WMA.pm	(working copy)
@@ -24,6 +24,7 @@
 	'GAIN_ALBUM_GAIN'    => 'REPLAYGAIN_ALBUM_GAIN',
 	'GAIN_ALBUM_PEAK'    => 'REPLAYGAIN_ALBUM_PEAK',
 	'PARTOFSET'          => 'DISC',
+	'ARTISTSORTORDER'    => 'ARTISTSORT',
 );
 
 {