Index: lib/libcasper/libcasper/libcasper.3
===================================================================
--- lib/libcasper/libcasper/libcasper.3
+++ lib/libcasper/libcasper/libcasper.3
@@ -47,6 +47,7 @@
 .Sh LIBRARY
 .Lb libcasper
 .Sh SYNOPSIS
+.Fd #define WITH_CASPER
 .In sys/nv.h
 .In libcasper.h
 .Ft "cap_channel_t *"