diff --git a/src/utils/translators/ldb/staffStation.ts b/src/utils/translators/ldb/staffStation.ts
index 5255b03..c28910f 100644
--- a/src/utils/translators/ldb/staffStation.ts
+++ b/src/utils/translators/ldb/staffStation.ts
@@ -82,7 +82,7 @@ function transformTrainServices(input: any): TrainServices[] {
       operatorCode: service?.operatorCode || "UK",
       platform: service?.platform || "-",
       platformIsHidden: service?.platformIsHidden,
-      serviceIsSupressed: checkIsSupressed(service).toString(),
+      serviceIsSupressed: checkIsSupressed(service),
       origin: transformLocation(service?.origin),
       destination: transformLocation(service?.destination),
       length: calculateLength(service),
@@ -106,9 +106,12 @@ function transformTrainServices(input: any): TrainServices[] {
   return output;
 }
 
-function checkIsSupressed(service: TrainServices): boolean {
-  // RETURN TRUE if 'serviceIsSupressed' OR 'isNonPublic'
-  return service.serviceIsSupressed == "true" || service.isNonPublic == "true";
+function checkIsSupressed(service: TrainServices): string | undefined {
+  if (service.serviceIsSupressed === "true" || service.isNonPublic === "true") {
+    return "true";
+  } else {
+    return undefined;
+  }
 }
 
 function transformLocation(input: any): ServiceLocation[] {