diff --git a/proxmox/resource_vm_qemu.go b/proxmox/resource_vm_qemu.go
index fb60d5e..c915af9 100644
--- a/proxmox/resource_vm_qemu.go
+++ b/proxmox/resource_vm_qemu.go
@@ -512,6 +512,7 @@ func resourceVmQemuUpdate(d *schema.ResourceData, meta interface{}) error {
 		Name:         d.Get("name").(string),
 		Description:  d.Get("desc").(string),
 		Onboot:       d.Get("onboot").(bool),
+		Agent:        d.Get("agent").(int),
 		Memory:       d.Get("memory").(int),
 		QemuCores:    d.Get("cores").(int),
 		QemuSockets:  d.Get("sockets").(int),