diff --git a/lib/libcasper/libcasper/libcasper.3 b/lib/libcasper/libcasper/libcasper.3
index c98a3044df25..ccd347232777 100644
--- a/lib/libcasper/libcasper/libcasper.3
+++ b/lib/libcasper/libcasper/libcasper.3
@@ -26,7 +26,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd January 10, 2023
+.Dd September 6, 2023
 .Dt LIBCASPER 3
 .Os
 .Sh NAME
@@ -212,6 +212,8 @@ Casper supports the following services in the base system:
 .Bl -tag -width "system.random" -compact -offset indent
 .It system.dns
 provides libc compatible DNS API
+.It system.fileargs
+provides an API for opening files specified on a command line
 .It system.grp
 provides a
 .Xr getgrent 3
@@ -272,6 +274,7 @@ functions always succeed.
 .Xr poll 2 ,
 .Xr select 2 ,
 .Xr cap_dns 3 ,
+.Xr cap_fileargs 3 ,
 .Xr cap_grp 3 ,
 .Xr cap_net 3 ,
 .Xr cap_netdb 3 ,