diff --git a/src/js/msp/MSPHelper.js b/src/js/msp/MSPHelper.js
index 44a16297a5..6d0d28acb4 100644
--- a/src/js/msp/MSPHelper.js
+++ b/src/js/msp/MSPHelper.js
@@ -796,6 +796,7 @@ MspHelper.prototype.process_data = function(dataHandler) {
                 console.log("Fw git rev:", FC.CONFIG.gitRevision);
 
                 if (semver.gte(FC.CONFIG.apiVersion, API_VERSION_1_46)) {
+                    FC.CONFIG.buildOptions = [];
                     let option = data.readU16();
                     while (option) {
                         FC.CONFIG.buildOptions.push(option);