diff --git a/esp/src/src/ESPLogicalFile.ts b/esp/src/src/ESPLogicalFile.ts
index b62354bf4e0..62f7a8a8e54 100644
--- a/esp/src/src/ESPLogicalFile.ts
+++ b/esp/src/src/ESPLogicalFile.ts
@@ -510,7 +510,7 @@ export function CreateDFUQueryStore(): BaseStore<HPCCWsDfu.DFUQueryRequest, type
         request.IncludeSuperOwner = true;
         return service.DFUQuery(request).then(response => {
             return {
-                data: response.DFULogicalFiles.DFULogicalFile,
+                data: response?.DFULogicalFiles?.DFULogicalFile ?? [],
                 total: response.NumFiles
             };
         });