Index: usr.bin/at/at.man
===================================================================
--- usr.bin/at/at.man
+++ usr.bin/at/at.man
@@ -216,7 +216,11 @@
 If a finer granularity is desired, the
 .Pa /etc/cron.d/at
 file can be edited and will be read by the system crontab, from which
-the SHELL and PATH environment variables are inherited. 
+the 
+.Ev SHELL 
+and 
+.Ev PATH
+environment variables are inherited. 
 .Sh OPTIONS
 .Bl -tag -width indent
 .It Fl q Ar queue