diff --git a/share/man/man4/da.4 b/share/man/man4/da.4
index a4c5718d6f85..cd906cc2f86f 100644
--- a/share/man/man4/da.4
+++ b/share/man/man4/da.4
@@ -262,6 +262,7 @@ slice, partition
 .Ar n
 .Ar p
 .Xc
+.Sm on
 raw mode
 .Tn SCSI
 disk unit
@@ -284,11 +285,13 @@ driver was written for the
 .Tn CAM
 .Tn SCSI
 subsystem by
-.An Justin T. Gibbs.
+.An Justin T. Gibbs .
 Many ideas were gleaned from the
 .Nm sd
 device driver written and ported from
 .Tn Mach
 2.5
-by Julian Elischer.  Support for slices was written by
-.An Bruce Evans.
+by
+.An Julian Elischer .
+Support for slices was written by
+.An Bruce Evans .