diff --git a/doc/xschem_man/tutorial_xschem_sky130.html b/doc/xschem_man/tutorial_xschem_sky130.html
index 42493131..62f9b05c 100644
--- a/doc/xschem_man/tutorial_xschem_sky130.html
+++ b/doc/xschem_man/tutorial_xschem_sky130.html
@@ -31,6 +31,7 @@ p{padding: 15px  30px 10px;}
        and building the program. If you want adms integration you must instal adms (<kbd>sudo apt install adms</kbd>).</li><br>
 
   <pre class="code">
+## clone the source repository into a local <kbd>ngspice_git</kbd> directory
 git clone https://git.code.sf.net/p/ngspice/ngspice ngspice_git
 cd ngspice_git
 mkdir release