diff --git a/misc-scripts/xref_mapping/xref_mapper.pl b/misc-scripts/xref_mapping/xref_mapper.pl
index f23fd997addf3d0957490679f40a7a68f2bfdbe7..c321e3ea1913c17dbf355e4f7fbc3dc1d248572d 100644
--- a/misc-scripts/xref_mapping/xref_mapper.pl
+++ b/misc-scripts/xref_mapping/xref_mapper.pl
@@ -21,6 +21,7 @@ xref_mapper.pl - Create Ensembl gene model xref mappings
 [B<-delete_external_db>]
 [B<-notriage>]
 [B<-delete_unmapped>]
+[B<-dumpcheck>]
 
 =back