diff --git a/src/main/java/org/opentripplanner/middleware/models/MonitoredTrip.java b/src/main/java/org/opentripplanner/middleware/models/MonitoredTrip.java
index e14d7d99..2a845273 100644
--- a/src/main/java/org/opentripplanner/middleware/models/MonitoredTrip.java
+++ b/src/main/java/org/opentripplanner/middleware/models/MonitoredTrip.java
@@ -493,6 +493,8 @@ public static TripUsers getAddedUsers(MonitoredTrip monitoredTrip, MonitoredTrip
      * @return The id of the primary traveler (the primary user of a trip,
      * or the user who created the trip if no primary user has been set).
      */
+    @JsonIgnore
+    @BsonIgnore
     public String getPrimaryTravelerId() {
         return primary != null ? primary.userId : userId;
     }