diff --git a/api/v1/swagger/definitions/library.json b/api/v1/swagger/definitions/library.json
index 112dfddde8..b7f8aa1774 100644
--- a/api/v1/swagger/definitions/library.json
+++ b/api/v1/swagger/definitions/library.json
@@ -83,6 +83,10 @@
     "geolocation": {
       "type": ["string", "null"],
       "description": "geolocation of your library"
+    },
+    "marcorgcode": {
+        "type": [ "string", "null" ],
+        "description": "MARC Organization Code, see http://www.loc.gov/marc/organizations/orgshome.html, when empty defaults to syspref MARCOrgCode"
     }
   },
   "additionalProperties": false,