diff --git a/docs/Assignments/week_4_programming/programming.md b/docs/Assignments/week_4_programming/programming.md
index 3ab2582..4585567 100644
--- a/docs/Assignments/week_4_programming/programming.md
+++ b/docs/Assignments/week_4_programming/programming.md
@@ -44,7 +44,7 @@ To install a library click the platformIO icon. In there click the libraries but
 After that it will edit platformio.ini and there you will see the library added to the project. It's also in `.pio/libdeps`
 
 ### Important for linux users.
-When setting up PlatformIO on another system we ran into the issue that the machine couldn't upload the code properly. We first checked how the OS interacted with `dmesg`. `dmesg` on linux shows the kernel activity.
+When setting up PlatformIO on another system we ran into the issue that the machine couldn't upload the code properly. We first checked how the OS interacted with `dmesg`. `dmesg` on linux shows the kernel activity. After a while we found out we needed to install the package `platformio-udev`. What it does it add some rules for the kernel on how to handle the mcu's.
 
 ### Programming and compiling and uploading
 Using platformIO is really straight forward. The only folder you should look at in your platformIO project is the `src` folder.