diff --git a/diskless.pkr.hcl b/diskless.pkr.hcl
index 376d223..8f39ddb 100644
--- a/diskless.pkr.hcl
+++ b/diskless.pkr.hcl
@@ -177,6 +177,7 @@ source "qemu" "diskless" {
   headless         = true
   vnc_bind_address  = "0.0.0.0"
   qemuargs          = [["-cpu", "host"],
+                      [ "-smp", "cpus=4,cores=4,sockets=1" ],
                       [ "-serial", "stdio" ]]
 
   http_directory = "http"