diff --git a/src/qortal/qortal-requests.ts b/src/qortal/qortal-requests.ts
index ba04c96..2836533 100644
--- a/src/qortal/qortal-requests.ts
+++ b/src/qortal/qortal-requests.ts
@@ -1939,7 +1939,7 @@ function setupMessageListenerQortalRequest() {
       case 'GET_PRIMARY_NAME': {
         try {
           const res = await getNameInfoForOthers(request.payload?.address);
-          const resData = res ? res : null;
+          const resData = res ? res : '';
           event.source.postMessage(
             {
               requestId: request.requestId,