diff --git a/NEWS.txt b/NEWS.txt
index 219ffc7f5..e57caa528 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -43,7 +43,8 @@
  * Add checkbox to toggle debug at runtime in log/debug view dialog
  * Add a plugin to add Artist Official Homepage relationships to the website tag (ID3 WOAR tag)
  * Add integrated functions $eq_any, $ne_all, $eq_all, $ne_any, $swapprefix and $delprefix.
- * Add %_performance_live%, %_performance_cover% etc. if track is shown as live, cover etc. in the MB database.
+ * Add %_performance_attributes%, containing performance attributes for the work e.g. live, cover, medley etc.
+   Use $inmulti in file naming scripts i.e. ...$if($inmulti(%_performance_attributes%,medley), (Medley),)
 
 
 Version 1.2 - 2013-03-30
diff --git a/picard/mbxml.py b/picard/mbxml.py
index 8c3071493..f14008d28 100644
--- a/picard/mbxml.py
+++ b/picard/mbxml.py
@@ -273,7 +273,7 @@ def performance_to_metadata(relation, m):
     if 'attribute_list' in relation.children:
         if 'attribute' in relation.attribute_list[0].children:
             for attribute in relation.attribute_list[0].attribute:
-                m["~performance_%s" % attribute.text] = "1"
+                m.add_unique("~performance_attributes", attribute.text)
 
 
 def work_to_metadata(work, m):