diff --git a/misc-scripts/xref_mapping/XrefMapper/wormbase.pm b/misc-scripts/xref_mapping/XrefMapper/wormbase.pm
index 33c91c34f476c43f342575c15d079db510eed597..7c228c6fbc7c436368f4b076caba99d2b1773fa9 100644
--- a/misc-scripts/xref_mapping/XrefMapper/wormbase.pm
+++ b/misc-scripts/xref_mapping/XrefMapper/wormbase.pm
@@ -7,8 +7,23 @@ use vars qw(@ISA);
 @ISA = qw(XrefMapper::BasicMapper);
 
 
-# Abstact superclass, not intended to be created directly. Contains
-# common methods for the "tierII" nematodes in WormBase
+# This module is activated by specifying "taxon=wormbase" in the mapping input file
+# It contains some common config for worms maintained by WormBase (i.e. having genes
+# with WBGene ids etc)
+
+sub set_methods{
+ 
+  my $default_method = 'ExonerateGappedBest1';
+  my %override_method_for_source = (  
+           ExonerateGappedBest5 => ['RefSeq_mRNA',
+                                    'RefSeq_mRNA_predicted', 
+                                    'RefSeq_ncRNA', 
+                                    'RefSeq_ncRNA_predicted' ],
+         );
+
+  return $default_method, \%override_method_for_source;
+}
+
 
 
 sub set_display_xrefs {