unforgivable oops, forgot xr spl(9)

diff --git a/share/man/man9/ctxsw.9 b/share/man/man9/ctxsw.9
index 1050225..9476a5e 100644 (file)
--- a/share/man/man9/ctxsw.9
+++ b/share/man/man9/ctxsw.9
@@ -142,5 +142,6 @@ should be called at
 .Xr splhigh 9 .
 .Pp
 .Sh SEE ALSO
+.Xr spl 9 ,
 .Xr tsleep 9 ,
 .Xr wakeup 9