diff --git a/etc/metadefs/operating-system.json b/etc/metadefs/operating-system.json
index 7a25d279cb..c844b3940b 100644
--- a/etc/metadefs/operating-system.json
+++ b/etc/metadefs/operating-system.json
@@ -22,6 +22,11 @@
             "title": "OS Version",
             "description": "Operating system version as specified by the distributor. (for example, '11.10')",
             "type": "string"
+        },
+        "os_admin_user": {
+            "title": "OS Admin User",
+            "description": "The name of the user with admin privileges.",
+            "type": "string"
         }
     }
 }