diff --git a/xCAT-server/share/xcat/netboot/fedora12/genimage b/xCAT-server/share/xcat/netboot/fedora12/genimage
index f88dcff10..07e80c171 100755
--- a/xCAT-server/share/xcat/netboot/fedora12/genimage
+++ b/xCAT-server/share/xcat/netboot/fedora12/genimage
@@ -862,9 +862,9 @@ EOMS
    print $inifile "elif [ -r /rootimg.gz ]; then\n";
    print $inifile "echo Setting up RAM-root tmpfs.\n";
    if ($rootlimit) {
-      print $inifile "  mount -o size=$rootlimit -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o size=$rootlimit mode=755 -t tmpfs rootfs /sysroot\n";
    } else {
-      print $inifile "  mount -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o mode=755 -t tmpfs rootfs /sysroot\n";
    }
    print $inifile "  cd /sysroot\n";
    print $inifile "  echo -n \"Extracting root filesystem:\"\n";
diff --git a/xCAT-server/share/xcat/netboot/rh/genimage b/xCAT-server/share/xcat/netboot/rh/genimage
index c88b887fe..f4ce2d82f 100755
--- a/xCAT-server/share/xcat/netboot/rh/genimage
+++ b/xCAT-server/share/xcat/netboot/rh/genimage
@@ -1184,9 +1184,9 @@ EOMS
    print $inifile "elif [ -r /rootimg.gz ]; then\n";
    print $inifile "echo Setting up RAM-root tmpfs.\n";
    if ($rootlimit) {
-      print $inifile "  mount -o size=$rootlimit -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o size=$rootlimit mode=755 -t tmpfs rootfs /sysroot\n";
    } else {
-      print $inifile "  mount -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o  mode=755 -t tmpfs rootfs /sysroot\n";
    }
    print $inifile "  cd /sysroot\n";
    print $inifile "  echo -n \"Extracting root filesystem:\"\n";
diff --git a/xCAT-server/share/xcat/netboot/sles/genimage b/xCAT-server/share/xcat/netboot/sles/genimage
index 4fd491987..c55468fea 100755
--- a/xCAT-server/share/xcat/netboot/sles/genimage
+++ b/xCAT-server/share/xcat/netboot/sles/genimage
@@ -1111,9 +1111,9 @@ EOMS
    print $inifile "elif [ -r /rootimg.gz ]; then\n";
    print $inifile "echo Setting up RAM-root tmpfs.\n";
    if ($rootlimit) {
-      print $inifile "  mount -o size=$rootlimit -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o size=$rootlimit  mode=755 -t tmpfs rootfs /sysroot\n";
    } else {
-      print $inifile "  mount -t tmpfs rootfs /sysroot\n";
+      print $inifile "  mount -o  mode=755 -t tmpfs rootfs /sysroot\n";
    }
    print $inifile "  cd /sysroot\n";
    print $inifile "  echo -n \"Extracting root filesystem:\"\n";