diff --git a/config.json b/config.json
index 51ca6c2..218eb17 100644
--- a/config.json
+++ b/config.json
@@ -85,6 +85,13 @@
             "settable": [
                 "value"
             ]
+        },
+        {
+            "name": "IDMAP",
+            "value": "",
+            "settable": [
+                "value"
+            ]
         }
     ],
     "network": {