Incorrect permissions on /dev/shm (CentOS 6)

Distro: CentOS 6 64-bit

VM type: KVM

/dev/shm gets incorrect permissions on boot. It should be mounted 1777, but is 0755 instead.

I guess I could put something in /etc/rc.local to fix it after boot, but I'm wondering if there's a "better" way. Ideas appreciated :)

[root@sal:~] ls -ld /dev/shm
drwxr-xr-x 2 root root 40 Apr  1 08:38 /dev/shm

[root@sal:~] cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Sun Mar  9 13:40:48 2014
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/sda       /               ext4    noatime,errors=remount-ro       0 1
/dev/sdb       none            swap    sw                              0 0
tmpfs                   /dev/shm                tmpfs   nodev,nosuid,noexec,mode=1777        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
/proc                    /proc                   proc    defaults        0 0

[root@sal:~] mount
/dev/sda on / type ext4 (rw,noatime,errors=remount-ro)
/proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)