How to force user to enter value > 0 for Field Type Float?

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Hello,

I have created a frappe.ui.Dialog in which I have added a field of Type Float and made this field Mandatory.

{
   label: __('Wire Size'),
   fieldname: 'wire_size',
   fieldtype: 'Float',
   precision: 2,
   reqd: 1
}

If a user enters the value 0.00 the Dialog accepts is as valid value. What I was expecting is that the value should be accepted only if it is greater then Zero and not Zero.

Have I to write a validation script for this field or is there a better way to force a user to enter a value greater then 0?

TIA

Yogi Yang