diff --git a/icalexport.py b/icalexport.py
index 95448e90e6a9f22adae001fc3700525b3a1cf983..7418f56d1d6a3bdd789edff81e794176e39b27cd 100644
--- a/icalexport.py
+++ b/icalexport.py
@@ -56,7 +56,7 @@ def ical_semester(semester):
 @app.route('/internal/ical/all')
 @calperm
 def ical_all():
-	return export_lectures(query('SELECT lectures.* FROM lectures lectures.visible = 1'),'videoag_all.ics')
+	return export_lectures(query('SELECT lectures.* FROM lectures WHERE lectures.visible = 1'),'videoag_all.ics')
 
 @app.route('/internal/ical/course/<course>')
 @calperm