diff --git a/Launching-the-tool-with-docker.md b/Launching-the-tool-with-docker.md
index d0322cc..fa78d6f 100644
--- a/Launching-the-tool-with-docker.md
+++ b/Launching-the-tool-with-docker.md
@@ -12,4 +12,6 @@ docker run \
    0xfeedc0de64/qtzeiterfassung
 ```
 
+If this fails because of permission problems to X11, try running `xhost +SI:localuser:root` before.
+
 All further launches can be done with `docker start zeiterfassung`
\ No newline at end of file