diff --git a/share/man/man4/da.4 b/share/man/man4/da.4
index cc94de740d97..1c935e4a216a 100644
--- a/share/man/man4/da.4
+++ b/share/man/man4/da.4
@@ -274,7 +274,6 @@ slice, partition
 .Sh DIAGNOSTICS
 None.
 .Sh SEE ALSO
-.Xr ad 4 ,
 .Xr disklabel 5 ,
 .Xr disklabel 8 ,
 .Xr fdisk 8