diff --git a/tmp/postinstall b/tmp/postinstall
index 2038cca..70fb4ec 100644
--- a/tmp/postinstall
+++ b/tmp/postinstall
@@ -297,6 +297,7 @@ echo "none	/proc		proc" >>$ROOTDIR/tmp/fstab
 echo "none	/proc/bus/usb	usbfs" >>$ROOTDIR/tmp/fstab
 echo "none	/dev/pts	devpts	gid=4,mode=620" >>$ROOTDIR/tmp/fstab
 echo "none	/tmp		tmpfs" >>$ROOTDIR/tmp/fstab
+echo "none	/dev/shm	tmpfs	mode=1777" >>$ROOTDIR/tmp/fstab
 if [ ! -z "$FSTABENTRY" ]; then
 	sed "s/\\$INSTROOT /\/ /" $ROOTDIR/tmp/fstab \
 	|sed "s/\\$INSTROOT//" >$ROOTDIR/etc/fstab