diff --git a/objects/person/definition.json b/objects/person/definition.json
index 6dd31b5..d6c2c2f 100644
--- a/objects/person/definition.json
+++ b/objects/person/definition.json
@@ -1,7 +1,8 @@
 {
   "requiredOneOf": [
     "first-name",
-    "last-name"
+    "last-name",
+    "alias"
   ],
   "attributes": {
     "text": {