diff --git a/doc/ikiwiki/directive/calendar.mdwn b/doc/ikiwiki/directive/calendar.mdwn
index 4814b02a9..412285c97 100644
--- a/doc/ikiwiki/directive/calendar.mdwn
+++ b/doc/ikiwiki/directive/calendar.mdwn
@@ -40,7 +40,7 @@ An example crontab:
 With [[setup option|plugins/calendar]] `calendar_autocreate`, all this work is
 done by `ikiwiki` itself. Thus, the crontab command can be replaced by:
 
-    0 0 * * * ikiwiki ~/ikiwiki.setup --refresh
+    0 0 * * * ikiwiki --setup ~/ikiwiki.setup --refresh
 
 ## usage