diff --git a/src/controllers/installationController.js b/src/controllers/installationController.js
index 48c11ed9..1346ed8b 100644
--- a/src/controllers/installationController.js
+++ b/src/controllers/installationController.js
@@ -1771,9 +1771,10 @@ exports.masterConnectedSlaveList = async (req, reply) => {
       ...restMasterFields
     } = master;
 
+    
     const masterResponse = {
       ...restMasterFields,
-      masterHardwareId: masterHardwareId,                  // new field
+      hardwareId: masterHardwareId,                  // new field
       isMaster: true,
       tankLocation: tankDetails?.tankLocation || null,
       product_status: master.product_status || 'pending',