diff --git a/etc/key_mapping b/etc/key_mapping
index ceacd5133cddd1e2c1d457b5e55bed1603e6c9cf..1dfbbf9b2dee2cc6b0896d620288e911599d8436 100644
--- a/etc/key_mapping
+++ b/etc/key_mapping
@@ -19,4 +19,5 @@ EST_match                                  misc_feature    note=EST_match
 match_part                                 misc_feature    note=match_part
 direct_repeat                              repeat_region   rpt_type=direct
 polypeptide_domain                         misc_feature
-centromere                                 misc_feature    note=centromere
\ No newline at end of file
+centromere                                 misc_feature    note=centromere
+modified_amino_acid_feature                misc_feature    note=modified_amino_acid_feature