diff --git a/misc-scripts/xref_mapping/XrefParser/BaseParser.pm b/misc-scripts/xref_mapping/XrefParser/BaseParser.pm
index bc5c0c39f4baac9d7178900e110f97c2851aa348..a63c03b97873cc766b9ef0bee1c33197ce3ae062 100644
--- a/misc-scripts/xref_mapping/XrefParser/BaseParser.pm
+++ b/misc-scripts/xref_mapping/XrefParser/BaseParser.pm
@@ -1974,6 +1974,7 @@ VALUES
       or croak("$master_xref\t$dependent_id\t$linkage\t$source_id");
     $xref_dependent_mapped{$master_xref."|".$dependent_id} = 1;
   }
+  return $dependent_id;
 }
 
 sub add_to_syn_for_mult_sources{