diff --git a/devicemodel/samples/nuc/launch_uos.sh b/devicemodel/samples/nuc/launch_uos.sh
index f2d49942a..5035aa7ec 100755
--- a/devicemodel/samples/nuc/launch_uos.sh
+++ b/devicemodel/samples/nuc/launch_uos.sh
@@ -101,6 +101,7 @@ acrn-dm -A -m $mem_size -c $2 -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio \
   -s 6,virtio-hyper_dmabuf \
   -s 3,virtio-blk,/home/clear/uos/uos.img \
   -s 4,virtio-net,tap0 \
+  -s 7,virtio-rnd \
   $logger_setting \
   --mac_seed $mac_seed \
   -k /usr/lib/kernel/default-iot-lts2018 \