diff --git a/etc/rc.initdiskless b/etc/rc.initdiskless
index 22712313cb80..423ee48f332a 100644
--- a/etc/rc.initdiskless
+++ b/etc/rc.initdiskless
@@ -145,7 +145,7 @@ chkerr() {
 # Create a generic memory disk
 #
 mount_md() {
-    /sbin/mdmfs -i 4096 -s $1 -M md $2
+    /sbin/mdmfs -S -i 4096 -s $1 -M md $2
 }
 
 # Create the memory filesystem if it has not already been created