1 files changed, 4 insertions, 3 deletions

diff --git a/share/man/man7/security.7 b/share/man/man7/security.7
index 4ec330e30fcb..8a3aee3e967b 100644
--- a/share/man/man7/security.7
+++ b/share/man/man7/security.7
@@ -548,11 +548,12 @@ All devices may be read or written subject to their permissions.
 Secure mode \- the system immutable and system append-only flags may not
 be turned off;
 disks for mounted file systems,
-.Pa /dev/mem ,
-.Pa /dev/kmem
+.Pa /dev/mem
 and
+.Pa /dev/kmem
+may not be opened for writing;
 .Pa /dev/io
-(if your platform has it) may not be opened for writing;
+(if your platform has it) may not be opened at all;
 kernel modules (see
 .Xr kld 4 )
 may not be loaded or unloaded.