diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index ea9cef1bc8dc03a7769f9c747b2cda7eaa8b5081..d074f150682b2c3c975b6a0cb58109e9d3b31e90 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -1118,6 +1118,8 @@ crontab -e  # edit schedule
 
 tail -n 1000 unb2b_modelsim_regression_test_vhdl_cron.log
 
+The crontab files are stored in /var/spool/cron/crontabs
+
 regtest@dop349:~$ crontab -l
 # Edit this file to introduce tasks to be run by cron.
 #