diff --git a/lib/libcalendar/calendar.3 b/lib/libcalendar/calendar.3
index 1c760e6ebadb..090e11917243 100644
--- a/lib/libcalendar/calendar.3
+++ b/lib/libcalendar/calendar.3
@@ -38,6 +38,8 @@
 .Nm week ,
 .Nm weekday
 .Nd Calendar arithmetic for the Christian era.
+.Sh LIBRARY
+.Lb libcalendar
 .Sh SYNOPSIS
 .Fd #include <calendar.h>
 .Ft struct date *