diff --git a/doc/gf-course.txt b/doc/gf-course.txt
index 9474c62b1..75491746f 100644
--- a/doc/gf-course.txt
+++ b/doc/gf-course.txt
@@ -22,7 +22,7 @@ Autumn Term 2007.
 21/8 Course mailing list started. 
 To subscribe, send a mail to ``gf-subscribe at gslt hum gu se`` 
 (replacing spaces by dots except around the word at, where the spaces 
-are just removed).
+are just removed, and the word itself is replaced by the at symbol).
 
 20/8/2007 [Schedule http://www.gslt.hum.gu.se/courses/schedule.html].
 The course will start on Thursday 13 September in Room C430 at the Humanities