diff --git a/isic_metadata/__init__.py b/isic_metadata/__init__.py
index 486c4ad..7a41482 100644
--- a/isic_metadata/__init__.py
+++ b/isic_metadata/__init__.py
@@ -56,6 +56,7 @@ class Field:
     "mel_class",
     "mel_mitotic_index",
     "anatom_site_general",
+    "anatom_site_special",
     "color_tint",
     "patient_id",
     "lesion_id",