diff --git a/share/man/man4/mpr.4 b/share/man/man4/mpr.4
index 66846c8b516..12039f8e0bf 100644
--- a/share/man/man4/mpr.4
+++ b/share/man/man4/mpr.4
@@ -393,7 +393,8 @@ The following levels are available:
 .Sh HISTORY
 The
 .Nm
-driver first appeared in FreeBSD 9.3.
+driver first appeared in
+.Fx 9.3 .
 .Sh AUTHORS
 The
 .Nm
diff --git a/share/man/man4/usfs.4 b/share/man/man4/usfs.4
index e8610beb9b7..a81f6717b79 100644
--- a/share/man/man4/usfs.4
+++ b/share/man/man4/usfs.4
@@ -65,4 +65,5 @@ Upon attach the driver creates a RAM disk which can be read and written.
 .Sh HISTORY
 The
 .Nm
-driver appeared in FreeBSD 8.
+driver appeared in
+.Fx 8.0 .