diff --git a/misc/zebra/usmarc/collection.abs b/misc/zebra/usmarc/collection.abs
index b1098a2bff..ba8ee07d30 100644
--- a/misc/zebra/usmarc/collection.abs
+++ b/misc/zebra/usmarc/collection.abs
@@ -22,6 +22,7 @@ xpath enable
 all any
 
 melm 090$c      identifier-standard,identifier-standard:p
+melm 020$a				isbn:w
 melm 100                author,author:p
 melm 110                author
 melm 111                author