diff --git a/README.md b/README.md
index 7bce176..b58c7c8 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,10 @@ systemctl --user list-timers 'sky-cam-*'
 
 # Test sunrise calculation
 python3 sunrise.py
+
+# echo 'export XDG_RUNTIME_DIR=/run/user/$(id -u)' >> ~/.bashrc
+source ~/.bashrc
+
 ```
 
 ---