diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index 4d647eb069d5ea1e5aa21179e81639d54b0028c0..30cefc41d2375990c2f02b735acb428c56dc14c7 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -23,6 +23,7 @@
 * Jupyter
 * Graphana
 * Zenodo DOI
+* Install OpenSCAD
 * Drawio