diff --git a/share/man/man4/da.4 b/share/man/man4/da.4
index 1c935e4a216a..240797a2e789 100644
--- a/share/man/man4/da.4
+++ b/share/man/man4/da.4
@@ -274,6 +274,7 @@ slice, partition
 .Sh DIAGNOSTICS
 None.
 .Sh SEE ALSO
+.Xr ata 4 ,
 .Xr disklabel 5 ,
 .Xr disklabel 8 ,
 .Xr fdisk 8