diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index a810dee399b16b315e7995c5d4fa0816463bb5aa..cfa0b46a1ff05f8f51d22b955e3b4b947f0500cd 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -1639,6 +1639,10 @@ Reading package lists... Done
 > sudo apt-get install openscad
 Gelukt!
 
+Add in ~/bashrc :
+export OPENSCADPATH=/dop466_0/kooistra/github/openscad/math:/dop466_0/kooistra/github/openscad/shapes
+
+Run OpenSCAD from terminal: > openscad &
 
 *******************************************************************************
 * Drawio