diff --git a/package-lock.json b/package-lock.json
index c5ef32a..dbc4bbc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "arduino-create-agent-js-client",
-  "version": "2.4.4",
+  "version": "2.4.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 047a15b..325a4bd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arduino-create-agent-js-client",
-  "version": "2.4.4",
+  "version": "2.4.5",
   "description": "JS module providing discovery of the Arduino Create Plugin and communication with it",
   "main": "lib/index.js",
   "module": "es/index.js",
diff --git a/src/daemon.js b/src/daemon.js
index 0407f06..c448726 100644
--- a/src/daemon.js
+++ b/src/daemon.js
@@ -133,7 +133,7 @@ export default class Daemon {
         const projectNameIndex = uploadCommandInfo.commandline.indexOf('{build.project_name}');
         let ext = uploadCommandInfo.commandline.substring(projectNameIndex + 21, projectNameIndex + 24);
         const data = compilationResult[ext] || compilationResult.bin;
-        if (!ext || !compilationResult[ext]) {
+        if (!ext || !data) {
           console.log('we received a faulty ext property, defaulting to .bin');
           ext = 'bin';
         }