diff --git a/o2web/source/x_component_process_Xform/Number.js b/o2web/source/x_component_process_Xform/Number.js
index e20e80d0e11c61a200c6288b95908a3218bb2010..e3b3d20d32f4f05bf5c70bbdf2062a502e4cc2ca 100644
--- a/o2web/source/x_component_process_Xform/Number.js
+++ b/o2web/source/x_component_process_Xform/Number.js
@@ -181,6 +181,9 @@ MWF.xApplication.process.Xform.Number = MWF.APPNumber =  new Class({
             this.validationMode();
         }.bind(this));
     },
+    _computeValue: function(value){
+        return (this.json.defaultValue.code) ? this.form.Macro.exec(this.json.defaultValue.code, this): (value || "0");
+    },
     getValue: function(){
         var value = this._getBusinessData();
         if (!value) value = this._computeValue();