diff --git a/README.md b/README.md
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@@ -33,6 +33,7 @@ Like many other open source softwares, QElectroTech is provided as it is, withou
 ### Development / technical choices
 
 The development follows the classical way of free and open source software: the source code, written by a community of users, is freely accessible.
+If you are reading this on Github, be aware that this is an hourly synced mirror. Our real code repository [is located here](https://git.tuxfamily.org/qet/qet.git/).
 
 Here are the technical choices made for the software development: