diff --git a/README.md b/README.md
index a1ab391..dee0618 100644
--- a/README.md
+++ b/README.md
@@ -128,6 +128,7 @@ You can also change  the pins by creating a custom [device profile](docs/DeviceP
     * upload_port
     * monitor_port
 * Select the arrow button in the blue bottom status bar (PlatformIO: Upload) to compile and upload the firmware. During the compilation, all required libraries are downloaded automatically.
+* Under Linux, if the upload fails with error messages "Could not open /dev/ttyUSB0, the port doesn't exist", you can check via ```ls -la /dev/tty*``` to which group your port belongs to, and then add your user this group via ```sudo adduser <yourusername> dialout```
 * There are two videos showing these steps:
     * [Git Clone and compilation](https://youtu.be/9cA_esv3zeA)
     * [Full installation and compilation](https://youtu.be/xs6TqHn7QWM)