diff --git a/Coding-Style.md b/Coding-Style.md
index d4eaa78..70b6710 100644
--- a/Coding-Style.md
+++ b/Coding-Style.md
@@ -12,6 +12,10 @@ The coding style of the project is based on the coding style of [Qt](https://www
 
 Member variables should be prefixed with a underscore. For example write `_myClassVariable` instead of `myClassVariable`.
 
+## Header files
+
+Every header file should contain a copyright note and `#pragma once` should preferred instead of `#ifndef` header guards.
+
 ## STL
 
 When possible use data structures from Qt. For example use `QVector` instead of `std::vector`.