diff --git a/proxmox/nodes/vms/custom_usb_device.go b/proxmox/nodes/vms/custom_usb_device.go
index e141c43d..51f70826 100644
--- a/proxmox/nodes/vms/custom_usb_device.go
+++ b/proxmox/nodes/vms/custom_usb_device.go
@@ -77,7 +77,7 @@ func (r *CustomUSBDevice) UnmarshalJSON(b []byte) error {
 	for _, p := range pairs {
 		v := strings.Split(strings.TrimSpace(p), "=")
 		if len(v) == 1 {
-			r.HostDevice = &v[1]
+			r.HostDevice = &v[0]
 		} else if len(v) == 2 {
 			switch v[0] {
 			case "host":
diff --git a/proxmox/nodes/vms/custom_usb_device_test.go b/proxmox/nodes/vms/custom_usb_device_test.go
index d1629ba9..4725b6eb 100644
--- a/proxmox/nodes/vms/custom_usb_device_test.go
+++ b/proxmox/nodes/vms/custom_usb_device_test.go
@@ -46,6 +46,13 @@ func TestCustomUSBDevice_UnmarshalJSON(t *testing.T) {
 				USB3:       types.CustomBool(false).Pointer(),
 			},
 		},
+		{
+			name: "spice usb device",
+			line: `"spice"`,
+			want: &CustomUSBDevice{
+				HostDevice: ptr.Ptr("spice"),
+			},
+		},
 	}
 
 	for _, tt := range tests {