diff --git a/models/Chart.json b/models/Chart.json
index d2879d9..7e0da01 100644
--- a/models/Chart.json
+++ b/models/Chart.json
@@ -2,6 +2,9 @@
   "type": "object",
   "description": "The chart of a system or waypoint, which makes the location visible to other agents.",
   "properties": {
+    "waypointSymbol": {
+      "type": "string"
+    },
     "submittedBy": {
       "type": "string"
     },
diff --git a/reference/SpaceTraders.json b/reference/SpaceTraders.json
index ad22593..7d3a42e 100644
--- a/reference/SpaceTraders.json
+++ b/reference/SpaceTraders.json
@@ -1220,10 +1220,14 @@
                       "properties": {
                         "chart": {
                           "$ref": "../models/Chart.json"
+                        },
+                        "waypoint": {
+                          "$ref": "../models/Waypoint.json"
                         }
                       },
                       "required": [
-                        "chart"
+                        "chart",
+                        "waypoint"
                       ],
                       "type": "object"
                     }