diff --git a/js/src/main.ts b/js/src/main.ts
index f33768d..5a5d1bc 100644
--- a/js/src/main.ts
+++ b/js/src/main.ts
@@ -9,7 +9,7 @@ if (started) {
 
 // Set the dock icon for development mode on macOS.
 if (process.platform === 'darwin' && !app.isPackaged) {
-  app.dock.setIcon(path.join(__dirname, '../../assets/icon.png'));
+  app.dock?.setIcon(path.join(__dirname, '../../assets/icon.png'));
 }
 
 const createWindow = () => {